Re: Apache Cassandra Sidecar - Vulnerability Advisory Location

igate any vulnerability reported in the project. Cheers, – Scott On May 20, 2025, at 4:20 PM, "Fleming, Jackson via user" wrote: Hi everyone, We’re looking at the Apache Cassandra Sidecar project ( https://github.com/apache/cassandra-sidecar ), our security team has asked us in

Re: Issues while joining

like an attempt to stream across incompatible versions of the database. https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/net/OutboundConnectionInitiator.java#L451-L467 – Scott On May 8, 2025, at 5:18 AM, Tibor Répási wrote: Hi all, Recently I face some issues when a

Re: Increased Disk Usage After Upgrading From Cassandra 3.x.x to 4.1.3

While it's true that COMPACT STORAGE was deprecated in Cassandra 4.0+, it was not removed. It's largely supported and works just fine for many use cases. Feedback from users indicated that removing it entirely would be disruptive because it required special effort from Cassandra users on upgrade

Re: SSTable Migration to oa-* Format After Upgrade to 5

Hi Edi,Details are in NEWS.txt: https://github.com/apache/cassandra/blob/cassandra-5.0/NEWS.txt– ScottOn Mar 16, 2025, at 11:37 AM, edi mari wrote:Sorry for jumping into the conversation, but I wanted to ask— is there an guide for upgrading Cassandra from v4 to v5? Edi בתאריך יום א׳, 16 במרץ 2025

Re: Cassandra ARM Support: What Version & What Download Links?

tarball. The artifacts should be universal.– Scott—MobileOn Mar 12, 2025, at 8:22 AM, Fred Habash wrote:Any confirmation or feedback will be appreciated. Thanks On Tue, Mar 11, 2025 at 3:07 PM Fred Habash <fmhab...@gmail.com> wrote:Trying to understand when Apache Cassandra started supporti

Re: Cassandra 5 Upgrade - Storage Compatibility Modes

on dev@ how we can improve this (e.g., enabling transitions via nodetool/JMX without process restarts); or ideally obviating the need to manually advance between them in 5.1/6.0 via TCM -- which might produce an even smoother upgrade path for 4.x users that requires minimal use action. – Scott On D

Re: Cassandra 5 Upgrade - Storage Compatibility Modes

epair sessions and performance improvements in 4.x as well. You may find that repair runs more smoothly for you after upgrading. – Scott On Dec 17, 2024, at 4:30 PM, Jeff Masud wrote: We have similar issues with 3.x repairs, and run manually as well as with Reaper. Can someone tell me, if I cannot

Re: null values injected while drop compact storage was executed

g when you observed this behavior and to file a Jira ticket? – Scott On May 7, 2024, at 7:18 AM, Jeff Jirsa wrote: This sounds a lot like cassandra-13004 which was fixed, but broke data being read-repaired during an alter statement I suspect it’s not actually that same bug, but may be clo

Re: Question Regarding Cassandra-19336

Cassandra community would recommend upgrading to the latest 4.0.x release at a minimum to take advantage of years of stability and performance improvements in the project. - Scott > On Feb 21, 2024, at 10:42 PM, ranju goel wrote: > >  > Hi All, > > https://issues.apac

Re: Tests failing for ppc64le architecture.

Pardon me, that should read user-unsubscr...@cassandra.apache.org for this list. On Jan 31, 2024, at 10:07 AM, C. Scott Andreas wrote: Hi Matt, To unsubscribe from this list, send a blank email to dev-unsubscr...@cassandra.apache.org . All messages or replies to the list are distributed to all

Re: Tests failing for ppc64le architecture.

details on managing mailing list subscriptions, see: https://cassandra.apache.org/_/community.html Thanks, – Scott On Jan 31, 2024, at 9:38 AM, Matt F wrote: unsubscribe On Wed, Jan 31, 2024 at 2:23 AM Sunidhi Gaonkar via user < user@cassandra.apache.org > wrote: Hi Bowen, My bad, Thank y

Re: Upgrade from 3.11.x to 4.1.3

Upgrading from 3.11.x to 4.1.x is supported, yes. As the documentation you reference mentions, it is not possible to downgrade from 4.x to 3.x. Note that running repair during upgrades is not supported; please ensure it is disabled before beginning the upgrade and re-enable after. – Scott

Re: Cassandra 4 production settings

recommended given JDK8’s age. – Scott > On Nov 20, 2023, at 12:31 AM, Sébastien Rebecchi > wrote: > > Hello > > There is no such page for Cassandra 4: > https://docs.datastax.com/en/cassandra-oss/3.0/cassandra/install/installRecommendSettings.html > > Do the recommend

Re: Upgrade from C* 3 to C* 4 per datacenter

and most tested upgrade path used by nearly everyone is a replica-safe rolling restart of instances in each datacenter, one datacenter at a time. Could you say more about the concerns you have with this upgrade path, or the worries you are hoping to mitigate? – Scott On Oct 26, 2023, at 8:32 AM, &quo

Re: [HELP] Cassandra 4.1.1 Repeated Bootstrapping Failure

Bowen, thanks for reaching out.My mind immediately jumped to a ticket which has very similar pathology: "CASSANDRA-18110: Streaming progress virtual table lock contention can trigger TCP_USER_TIMEOUT and fail streaming" -- but I see this was fixed in 4.1.1.On Sep 11, 2023, at 2:09 PM, Bowen Son

Re: Testing Cassandra connectivity at application startup

“select * from …” without a predicate from a user table would be very expensive, yes. A query from a small, node-local system table such as “select * from system.peers” would make a better health check. 👍 - Scott > On Aug 25, 2023, at 10:58 AM, Raphael Mazelier wrote: > >  >

Re: Big Data Question

A few thoughts on this:– 80TB per machine is pretty dense. Consider the amount of data you'd need to re-replicate in the event of a hardware failure that takes down all 80TB (DIMM failure requiring replacement, non-reduntant PSU failure, NIC, etc).– 24GB of heap is also pretty generous. Dependi

Re: Unsubscribe

Hi Mark,You can unsubscribe from this mailing list by sending a blank email to "user-unsubscr...@cassandra.apache.org" from the address that is subscribed to the list. Other members of the list are not able to take this action on someone's behalf.Details on how to join and leave lists are here:

Re: Open File Descriptors not cleared post upgrade from 3.11.9 to 4.0.5.

Vaibhav, thank you for reaching out and sharing this issue report.Could you run an `lsof` and share which SSTable files you see open (e.g., all SSTable components or a subset of them); and also share the value of the `disk_access_mode` property from your cassandra.yaml?Opening a Jira ticket for

Re: Running mixed 4.0 and 4.1 clusters

period, could you say more about what might motivate that? – Scott > On Aug 14, 2023, at 10:26 AM, Doug Whitfield via user > wrote: > > Hi folks, > > I know it is impossible to run 3.x and 4.x nodes in the same cluster. Is it > possible to run 4.0 and 4.1 nodes togeth

Re: Materialized View inconsistency issue

That’s correct, yes. There is no current or upcoming version of Apache Cassandra in which materialized views are expected to be considered production-ready and maintain full consistency with their base table at this time.The feature is classified as “experimental” to indicate that this behavior is

Re: Bootstrapping new node throwing error - Mutation too large

The performance implications would primarily be due to the challenge of handling mutations this large themselves rather than the commitlog segment size. These would occupy large, contiguous areas of heap and increase memory pressure in the process.Increasing  commit_log_segment_size_in_mb is lik

Re: Deletions getting omitted

Can you check the write timestamp of the data you're attempting to delete?https://docs.datastax.com/en/cql-oss/3.3/cql/cql_using/useWritetime.htmlIf the timestamp of the write is in the future (e.g., due to a time sync issue or an errant client-supplied timestamp at the time of that write), the

Re: Cassandra Summit update for 2023-01-24

Hugely excited to this – thanks to the Program Committee and to the Linux Foundation for organizing!It's been a long few years away from conferences and I can't wait to see all of you.Beyond learning about what everyone is doing with Apache Cassandra, I'm looking forward to the hallway chats an

Re: Failed disks - correct procedure

Bumping this note from Andy downthread to make sure everyone has seen it and is aware:“Before you do that, you will want to make sure a cycle of repairs has run on the replicas of the down node to ensure they are consistent with each other.”When replacing an instance, it’s necessary to run repair (

Re: Compactions are stuck in 4.0.5 version

Hi Vaibhav, thanks for reaching out.Based on my understanding of this exception, this may be due to the index for this partition exceeding 2GiB (which is *extremely* large for a partition index component).Reducing the size of the column index below 2GiB may resolve this issue. You may be able to

Re: Cassandra Summit CFP update

things we build with it. One more thing. We need sponsors! If your employer > can, this is a great opportunity to get your brand out in front of people > building the future. I’ll be back. Go submit a talk. You’ll be happy you > did! Patrick* > -- Scott Hirleman scott.hirle...@gmail.com

Re: Change the compression algorithm on a production table at runtime

Thanks for reaching out. Changing the compressor for a table is both safe and common. Future flushes / compactions will use the new codec as SSTables are written, and SSTables currently present on disk will remain readable with the previous codec. You may also want to take a look at the Zstanda

Re: Cassandra 4.0 upgrade - Upgradesstables

No downside at all for 3.x -> 4.x (however, Cassandra 3.x reading 2.1 SSTables incurred a performance hit).Many users of Cassandra don't run upgradesstables after 3.x -> 4.x upgrades at all. It's not necessary to run until a hypothetical future time if/when support for reading Cassandra 3.x SST

Re: Understanding multi region read query and latency

> but still as I understand the documentation the read repair should not be in the blocking path of a query ?Read repair is in the blocking read path for the query, yep. At quorum consistency levels, the read repair must complete before returning a result to the client to ensure the data returned w

Re: Cassandra 3.0 upgrade

. - Scott > On Jun 13, 2022, at 10:36 PM, Jaydeep Chovatia > wrote: > >  > Thanks Jeff and Scott for valuable feedback! > One more question, do we have to upgrade the dTest repo if we go to 3.0.27, > or the one we have currently already working with 3.0.14 should continue to >

Re: Cassandra 3.0 upgrade

on a great 3.0.x build. If all looks good from there, you should have an easy upgrade to 4.0.4. I would not recommend passing through intermediate 3.0.x releases on the way to 3.0.27; doing so is not necessary. Cheers, - Scott > On Jun 13, 2022, at 10:17 PM, Runtian Liu wrote: > &g

Re: Gossip issues after upgrading to 4.0.4

Hi Gil, thanks for reaching out.Can you check Cassandra's logs to see if any uncaught exceptions are being thrown? What you described suggests the possibility of an uncaught exception being thrown in the Gossiper thread, preventing further tasks from making progress; however I'm not aware of any

Re: Datastax Java Driver Compatibility Matrix

tOn Apr 19, 2022, at 11:45 AM, Jai Bheemsen Rao Dhanwada wrote:Thank you Scott for the information.I am currently using the 3.2 version of Datastax Driver and using the Cluster Builder with Protocol Version V3. Does this mean 3.2 with protocol version v3 can still work with Cassandra4.0 server?Als

Re: Datastax Java Driver Compatibility Matrix

The DataStax Java 3.x drivers work very well with Apache Cassandra 4.0. I'd recommend one of the more recent releases in the series, though (e.g., 3.6.x+).I'm not the author of this documentation, but it may refer to the fact that the 3.x Java Driver supports the CQL v4 wire protocol, but not t

Re: Cassandra 3.0.14 transport completely blocked

Hi Jaydeep, thanks for reaching out.The most notable deadlock identified and resolved in the last few years is https://issues.apache.org/jira/browse/CASSANDRA-15367: Memtable memory allocations may deadlock (fixed in Apache Cassandra 3.0.21).Mentioning for completeness - since the release of Cas

Re: Cassandra Management tools?

I use pssh -i -h hosts nodetool for one-offs. Rolling restart is tricky to automate, but haven't had to yet. If I were to, I would be sure to do a test connect and query to confirm the node is up before going to the next one. For automation I use python fabric. I too, would be curious what othe

Re: Query timed out after PT2M

Hi Joe, it looks like "PT2M" may refer to a timeout value that could be set by your Spark job's initialization of the client. I don't see a string matching this in the Cassandra codebase itself, but I do see that this is parseable as a Duration.```jshell> java.time.Duration.parse("PT2M").getSeco

Re: Hanging repairs in Cassandra

release in the 3.11 series at minimum (3.11.11). You may find that the issue is resolved; or if not, be able to draw upon the community’s knowledge of a current release of the database. — Scott > On Jan 21, 2022, at 8:51 PM, manish khandelwal > wrote: >  > Hi All > > After

Re: gc throughput

Hi, I noticed that you mentioned your goal is to optimize write throughput, and that you're using Cassandra 3.11.2.Optimizing for write throughput is usually a proxy for optimizing for compaction, as the cost of writes are very cheap but compacting to keep up with it can be pretty expensive.You'

Re: state of incremental repairs in cassandra 3.x

Hi James, thanks for reaching out.A large number of fixes have landed for Incremental Repair in the 3.x series, though it's possible some may have been committed to 4.0 without a backport. Incremental repair works well on Cassandra 4.0.1. I'd start here to ensure you're picking up all fixes tha

Re: [RELEASE] Apache Cassandra 4.0.0 released

Thank you Scott! We installed over on top of 3.11 and it's working fine. Easy non-upgrade path :) Thanks again, Adam On 2021/07/28 22:49:11, Scott Andreas wrote: > If you're running Cassandra 3.x, the only data file requirement is that all > SSTables present on your clu

Re: [RELEASE] Apache Cassandra 4.0.0 released

ture, it may be necessary to run upgradesstables prior to upgrading to confirm there are no 3.x SSTables left -- but no such post-4.0 SSTable format changes have been proposed yet. ____ From: Adam Scott Sent: Wednesday, July 28, 2021 2:58 PM To: user@cassa

Re: [RELEASE] Apache Cassandra 4.0.0 released

Thanks Brandon! Anyone know the upgrade path from 3.x? https://cassandra.apache.org/doc/latest/cassandra/getting_started/installing.html Doesn't look like it has specific upgrade instructions. For instance do we need to run nodetool upgradesstables? TIA On 2021/07/26 20:03:59, Brandon Wil

Re: cassandra 4.0 java 11 support

Anecdotally, I have no issues to report running Cassandra 4.0 on JDK11 and would be supportive of removing the "experimental" classification in an upcoming release. From: Erick Ramirez Sent: Tuesday, July 27, 2021 3:57 PM To: user@cassandra.apache.org Su

Re: R/W timeouts VS number of tables in keyspace

and may be unlawful. When addressed >> to our clients any opinions or advice contained in this Email are subject >> to the terms and conditions expressed in any applicable governing The Home >> Depot terms of business or client engagement letter. The Home Depot >> disclaims all responsibility and liability for the accuracy and content of >> this attachment and for any damages or losses arising from any >> inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other >> items of a destructive nature, which may be contained in this attachment >> and shall not be liable for direct, indirect, consequential or special >> damages in connection with this e-mail message or its attachment. >> > -- Scott Hirleman scott.hirle...@gmail.com

Re: 4.0 best feature/fix?

tachment >> and shall not be liable for direct, indirect, consequential or special >> damages in connection with this e-mail message or its attachment. >> >> >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >> Virus-free. >> www.avg.com >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >> <#m_-3272604231784000544_m_654382365824200109_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> >> -- Scott Hirleman scott.hirle...@gmail.com

Re: Network Bandwidth and Multi-DC replication

rds > Jens > > Geschäftsführer: Oliver Koch (CEO), Jean-Baptiste Cornefert, Christoph > Ostermann, Hermann Schweizer, Bianca Swanston > Amtsgericht Kempten/Allgäu, Registernummer: 10655, Steuernummer > 127/137/50792, USt.-IdNr. DE272208908 > > > Geschäftsführer: Oliver Ko

Re: Bootstraping is failing

dra again on the new node > , will it resume bootstrap or will it start over? > > On Thu, 7 May 2020 at 13:32, Adam Scott wrote: > >> I recommend it on all nodes. This will eliminate that as a source of >> trouble further on down the road. >> >> >> On Thu,

Re: Bootstraping is failing

> > > On Thu, 7 May 2020 at 13:23, Adam Scott wrote: > >> >> *edit >> /etc/sysctl.confnet.ipv4.tcp_keepalive_time=60 >> net.ipv4.tcp_keepalive_probes=3net.ipv4.tcp_keepalive_intvl=10* >> then run sysctl -p to cause the kernel to reload the settings

Re: Bootstraping is failing

abc cassandra]# cat /proc/sys/net/ipv4/tcp_keepalive_time > > 300 > > [root@abc cassandra]# cat /proc/sys/net/ipv4/tcp_keepalive_intvl > > 30 > > [root@abc cassandra]# cat /proc/sys/net/ipv4/tcp_keepalive_probes > > 9 > > On Thu, 7 May 2020 at 12:32, Adam Scott

Re: Bootstraping is failing

Maybe a firewall killing a connection? What does the following show? cat /proc/sys/net/ipv4/tcp_keepalive_time cat /proc/sys/net/ipv4/tcp_keepalive_intvl cat /proc/sys/net/ipv4/tcp_keepalive_probes On Thu, May 7, 2020 at 10:31 AM Surbhi Gupta wrote: > Hi, > > We are trying to expand a datacente

Re: UDF related question

Hi Kant, A common pattern in sandboxing (semi-)untrusted code* in Java processes is to make use of a SecurityManager with an associated Policy. These

Re: Commercial Support Providers?

t;> patched, version of Cassandra that would be ideal, and certainly management >> tools like OpsCenter are a bonus. >> >> The obvious choice here is DataStax, and we’re definitely talking to >> them. Are there any other providers which offer this sort of service? >&g

Re: Improving cassandra documentation

> http://cassandra.apache.org/doc/latest/ > > You can contribute to them directly via git > > On Thu, 3 Nov 2016 at 12:11 SmartCat - Scott Hirleman > wrote: > >> http://docs.datastax.com/en/landing_page/doc/landing_page/contact.html >> Looks like it is still just email d...

Re: Improving cassandra documentation

eport them? > > Thanks. > > -- > > Oleg Krayushkin > -- *Scott Hirleman* *Head of US Marketing and Sales* www.smartcat.io https://github.com/smartcat-labs <http://www.smartcat.io/> <https://github.com/smartcat-labs>

Re: Unsubscribe

That doesn't work. You need to send an email to user-unsubscribe@cassandra. apache.org On Sat, Oct 29, 2016 at 1:53 AM, dhanesh malviya wrote: > > > -- > Regards, > Dhanesh Malviya.. > -- *Scott Hirleman* *Head of US Marketing and Sales* www.smartcat.io https://g

Re: unsubscribe

That doesn't work. You need to send an email to user-unsubscr...@cassandra.apache.org On Thu, Oct 27, 2016 at 11:22 AM, Anseh Danesharasteh < anseh.dan...@gmail.com> wrote: > unsubscribe > -- *Scott Hirleman* *Head of US Marketing and Sales* www.smartcat.io https://github.

Re: Upgrading from Cassandra 2.1.12 to 3.0.9

.12 to 3.7. >> >> >> >> I have read the following documentation: >> >> · http://docs.datastax.com/en/latest-upgrade/upgrade/ >> cassandra/upgrdCassandra.html >> >> · https://github.com/apache/cassandra/blob/cassandra-3.7/NEWS.txt >> >> >> >> but still had some questions: >> >> · The upgrdCassandra.html page says : “Upgrade from Cassandra >> 2.1 versions later or equal to 2.1.9 directly to Cassandra 3.0.x”, and I am >> not sure if this includes 3.x, my question is: Can I upgrade directly to >> 3.7? >> >> · Can I run a heterogeneous cluster, with one DC running 2.1.12 >> and another DC running 3.7? >> >> >> >> Thanks, >> >> -Razi >> >> >> > -- *Scott Hirleman* *Head of US Marketing and Sales* www.smartcat.io https://github.com/smartcat-labs <http://www.smartcat.io/> <https://github.com/smartcat-labs>

Re: Scalability of Gossip protocol

t;> *To: *"user@cassandra.apache.org" >> *Subject: *Scalability of Gossip protocol >> >> >> >> Hi all; >> >> Please is there a scientific study that evaluates the scalability of >

Re: Support/Consulting companies

https://www.smartcat.io/ I'll throw our name in the ring; 2 C* MVPs and counting :) On Mon, Aug 22, 2016 at 7:54 AM, Andres de la Peña wrote: > http://www.stratio.com/ > > > On 2016-08-19 20:02 (+0100), Roxy Ubi wrote: > > Howdy, > > > > I'm looking for a list of support or consulting companies

Re: Open source equivalents of OpsCenter

ify's Reaper https://github.com/spotify/cassandra-reaper re repairs Scott SmartCat - Big Data Development Consulting That Doesn't Suck On Thu, Jul 14, 2016 at 3:48 AM, Michał Łowicki wrote: > My experience while looking for a replacement on > > https://medium.com/@mlowicki/

unsubscribe

Scott Thompson This message and any attached documents are only for the use of the intended recipient(s), are confidential and may contain privileged information. Any unauthorized review, use, retransmission, or other disclosure is strictly prohibited

Re: counters + replication = awful performance?

ave Cassandra data on a separate disk, commit log and > cache are > >>> currently on the same disk as the system. I experimented with > commit > >>>log > >>> flush modes and even with disabling commit log at all -- but > it doesn't >

get_paged_slice with SlicePredicate

back? I'd like to page over many rows, but only have data that is contained in a SlicePredicate be returned. Thanks for your help, Scott Fines

RE: JMX BulkLoad weirdness

cular SSTable in the set was corrupted? Scott From: aaron morton [aa...@thelastpickle.com] Sent: Wednesday, January 18, 2012 1:52 AM To: user@cassandra.apache.org Subject: Re: JMX BulkLoad weirdness I'd need the version number to be sure, but it looks like

RE: JMX BulkLoad weirdness

or a different machine is something that I don't really want to bother with, if I can activate it through JMX. It seems like the JMX bulkloader works perfectly fine, however, except for the error that I mentioned below. So I suppose I'll ask again, is that error something to be concern

JMX BulkLoad weirdness

dle of checking that right now). Is this an error that I should be concerned about? Thanks, Scott

Re: column family names

I don't necessarily disagree with these personal conventions, but on things like unique names it's my observation that others have other approaches...so in general I think it's desirable to be as weak on these naming restrictions as possible at the lower layers. Scott

Re: column family names

' and perhaps others...if possible)...and then having some minimal docs on the restrictions...in addition to the source...just so that users can easily comply with the restrictions. I'll agree to help with the docs if things are decided. Thanks, Scott On 12/29/2011 9:41 AM, Edw

column family names

(and keyspace names...if there are any such restrictions). If so, where? Thanksinadvance, Scott

RE: ConcurrentModificationException during nodetool repair

Created https://issues.apache.org/jira/browse/CASSANDRA-3400 Thanks for your help, Scott Fines From: Sylvain Lebresne [sylv...@datastax.com] Sent: Monday, October 24, 2011 11:37 AM To: user@cassandra.apache.org Subject: Re: ConcurrentModificationException

ConcurrentModificationException during nodetool repair

your help, Scott Fines

RE: MapReduce with two ethernet cards

Looks like that did it, thanks! Scott From: Brandon Williams [dri...@gmail.com] Sent: Thursday, October 13, 2011 2:16 PM To: user@cassandra.apache.org Subject: Re: MapReduce with two ethernet cards On Thu, Oct 13, 2011 at 1:17 PM, Scott Fines wrote

RE: MapReduce with two ethernet cards

instead of the normal thrift IPs. That leads me to think that I need to have thrift listening on both IPs, though. Would that then be the case? Scott From: Scott Fines [scott.fi...@nisc.coop] Sent: Thursday, October 13, 2011 12:40 PM To: user

RE: MapReduce with two ethernet cards

: MapReduce with two ethernet cards What is your rpc_address set to? If it's 0.0.0.0 (bind everything) then that's not going to work if listen_address is blocked. -Brandon On Thu, Oct 13, 2011 at 11:13 AM, Scott Fines wrote: > I upgraded to cassandra 0.8.7, and the problem persis

RE: MapReduce with two ethernet cards

I upgraded to cassandra 0.8.7, and the problem persists. Scott From: Brandon Williams [dri...@gmail.com] Sent: Monday, October 10, 2011 12:28 PM To: user@cassandra.apache.org Subject: Re: MapReduce with two ethernet cards On Mon, Oct 10, 2011 at 11:47 AM

seeking contractor to assist with upgrade/expansion

hope this is not off topic? we've been struggling following ostensible procedures for awhile now, ready to pony up for some pro help (but not quite ready to pony up for datastax). please contact me at svd at mylife dot com if you are interested. -scott

MapReduce with two ethernet cards

t 9160 between Hadoop and Cassandra? Thanks for your help, Scott

sstable2json weirdness

can massage sstable2json into not emitting duplicates? These duplicates eat a great deal of disk space and processing power to manipulate, which I'd like to avoid. Thanks for your help, Scott

RE: Queue suggestion in Cassandra

ms like ActiveMQ (activemq.apache.org) or RabbitMQ(http://www.rabbitmq.com/). I'm a fan of Kafka myself. Thanks for the menagerie shoutout though...:) Scott Fines From: Milind Parikh [milindpar...@gmail.com] Sent: Friday, September 16, 2011 6:12 PM To: user@cassandra.apache.o

commitlogs not draining

:DEBUG [COMMIT-LOG-WRITER] 2011-07-06 11:04:10,076 CommitLog.java (line 473) Not safe to delete commit log CommitLogSegment(/data/var/lib/cassandra/commitlog/CommitLog-1309288064262.log); dirty is LocationInfo (0), ; hasNext: true -scott

Re: 99.999% uptime - Operations Best Practices?

s implies extra time and operational cost, hopefully within the boundaries of the revenue stream the system is expected to support. Pardon the long e-mail and for waxing a bit philosophical. I hope this provides some food for thought. - Scott --- C. Scott Andreas Engineer, Urban Airship, Inc.

RE: Reboot, now node down 0.8rc1

I have not changed any defaults as of yet. Yes, I do have super columns, but my gc_grace_seconds is default. Scott -Original Message- From: Sylvain Lebresne [mailto:sylv...@datastax.com] Sent: Tuesday, May 24, 2011 8:53 AM To: user@cassandra.apache.org Subject: Re: Reboot, now node

RE: Reboot, now node down 0.8rc1

It was a 0.8beta2 install that last week I upgraded to rc1. I will turn the logging up to debug the next time I have issues to get more details. Thank you. Scott -Original Message- From: aaron morton [mailto:aa...@thelastpickle.com] Sent: Monday, May 23, 2011 6:42 PM To: user

RE: Reboot, now node down 0.8rc1

n the node and bring it back? Or am I missing completely what the commitlog is? Scott -Original Message- From: Scott McPheeters [mailto:smcpheet...@healthx.com] Sent: Monday, May 23, 2011 2:18 PM To: user@cassandra.apache.org Subject: Reboot, now node down 0.8rc1 I have a test node s

Reboot, now node down 0.8rc1

) at org.apache.cassandra.io.util.ColumnIterator.deserializeNext(ColumnSorted Map.java:261) ... 17 more Cannot load daemon Service exit with a return value of 3 Scott

RE: Ghost token

Ahh, thanks. I got questioned on that as soon as our test environment came up and I had no idea. Thanks for the reply. Scott -Original Message- From: Ryan King [mailto:r...@twitter.com] Sent: Friday, May 13, 2011 1:03 PM To: user@cassandra.apache.org Subject: Re: Ghost token

Ghost token

Has anyone seen this and know if it is causing an issue or how to fix it? Anytime I run nodetool ring (on any node) I get this extra token show up on the top of the list. Address Status State LoadOwnsToken 113427455640312821154458202477256070484 10.1.2.171 Up

Flush / Snapshot Triggering Full GCs, Leaving Ring

ng that, and would like to figure out why we see long CMS collections + promotion failures triggering full GCs during a snapshot. Has anyone seen this, or have suggestions on how to prevent full GCs from occurring during a flush / snapshot? Thanks, - Scott --- C. Scott Andreas Engineer, Urban Airship, Inc. http://www.urbanairship.com

Re: Introduce Random latency

it on the network level without having to modify any source(assuming you are on linux). Scott On Wed, Apr 6, 2011 at 11:20 AM, A J wrote: > I want to run some tests where I incorporate random latency in some of > the nodes (that varies over time). I think the best place is to place > a

How do I repair what looks to be a corrupt sstable index?

ing CL=QUORUM for reads and writes for quite a while. Something tells me it's not as easy as deleting the index file :-) Of course, the bigger question is how did it get this way... Thanks! Scott

Re: Deleted columns still coming back; CASSANDRA-{1748,1837} alive in 0.6.x?

ns that aren't supposed to be there on the nodes. At least that's what I've convinced myself of! As far as running flush before repair, I got that idea from the comments in 1748. I'm not convinced at all it's necessary but thought it might help if there was (still?) a problem

Deleted columns still coming back; CASSANDRA-{1748,1837} alive in 0.6.x?

flush), we have GCGraceSeconds set to 2 days, and read/writes for our tests are CL.ALL. Should we be running nodetool compact also? Thanks, Scott

Has anyone seen column deletes that seem not to actually delete the column?

snip] This is about 5 minutes after the delete. I definitely can't say that it's not a client-side failure where that exception is getting silently swallowed. My concern is that the delete request makes it to the server but somehow gets lost (on a one node cluster...). Does anyone know if there's a known issue related to losing delete requests? Thanks, Scott

Re: Basic question on distributed delete

some apparently permanent inconsistencies when we haven't had any known node failures, so I wanted to check on my basic understanding of the distributed delete operation. Thanks, Scott On Wed, Jan 19, 2011 at 2:05 PM, Peter Schuller wrote: > > When we do a delete on a column in the a

Basic question on distributed delete

rk problems, etc.) in order to have eventual consistency. Thanks, Scott

Re: Node Inconsistency

e 68). Running "nodetool ring" shows all 5 of them have the same view of the ring. The configuration for the cluster has not changed in quite a while, and we're running 0.6.8 right but were running 0.6.5 for quite a while. Thanks, Scott On Mon, Jan 10, 2011 at 8:27 AM, Tyler Ho

Re: Cassandra and disk space

i recently finished a practice expansion of 4 nodes to 5 nodes, a series of "nodetool move", "nodetool cleanup" and jmx gc steps. i found that in some of the steps, disk usage actually grew to 2.5x the base data size on one of the nodes. i'm using 0.6.4. -scott O

Re: Clustering in .7 beta 2

Are you aware of this: http://wiki.apache.org/cassandra/JmxGotchas/ ? -Scott

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