GUI for Cassandra now included in Virgil

I got around to implementing a GUI for Cassandra in Virgil. It was really simple. (100 lines of javascript) You can see a screenshot here: http://code.google.com/a/apache-extras.org/p/virgil/wiki/gui For those that were looking for a way to embed data visualization into their applications, you ca

AUTO: Manoj Chaudhary is out of the office (returning 11/27/2011)

I am out of the office until 11/27/2011. I am on Vacation from 11/21/2011. I will be returning to office on 11/28/2011. For anything urgent please contact Rishi Vaish(Rishi Vaish/San Jose/IBM) Note: This is an automated response to your message "Organization Meeting - Austin Hackers Dojo - B

Re: cassandra-cli prompt meaning

The first part of the prompt is for the authenticated user. Authentication is per-keyspace, hence the default after you have switched keyspaces. On Fri, Nov 18, 2011 at 6:42 PM, Sarah Baker wrote: > Re: Cassandra 0.8.7 > > > > Where will I find what the first part of the Cassandra-cli prompt mean

Re: UUIDType

no particular reason, just wanting clarification b/c i saw a post (from ed anuff i think) about java.util.UUID being inconsistent with RFC4122, and this coming to light when looking at Cassandra's TimeUUIDType and LexicalUUIDType. so i wondered if cassandra's types were consistent with RFC4122

Re: Pending ReadStage is exploding on only one node

Yes, it's random partioned. Am 21.11.2011 13:47, schrieb Jahangir Mohammed: Hmm..What's the data distribution like on cluster? R.P.? On Mon, Nov 21, 2011 at 7:31 AM, Johann Höchtl wrote: I'm using

Re: Update column family to SerializingCacheProvider not working

Yes, that's fixed for 0.8.8 in CASSANDRA-3414. On Mon, Nov 21, 2011 at 1:18 PM, Edward Capriolo wrote: > Apache Cassandra 0.8.7. It seems that changing  row_cache_provider is a > no-op. Or am I doing something wrong? > > [default@SegmentData] use SegmentData; > Authenticated to keyspace: SegmentD

Re: What sort of load do the tombstones create on the cluster?

On Mon, Nov 21, 2011 at 11:47 AM, Edward Capriolo wrote: > > > On Mon, Nov 21, 2011 at 3:30 AM, Philippe wrote: >> >> I don't remember your exact situation but could it be your network >> connectivity? >> I know I've been upgrading mine because I'm maxing out fastethernet on a >> 12 node cluster.

Re: What sort of load do the tombstones create on the cluster?

On Mon, Nov 21, 2011 at 3:30 AM, Philippe wrote: > I don't remember your exact situation but could it be your network > connectivity? > I know I've been upgrading mine because I'm maxing out fastethernet on a > 12 node cluster. > Le 20 nov. 2011 22:54, "Jahangir Mohammed" a > écrit : > >> Mostly

Update column family to SerializingCacheProvider not working

Apache Cassandra 0.8.7. It seems that changing row_cache_provider is a no-op. Or am I doing something wrong? [default@SegmentData] use SegmentData; Authenticated to keyspace: SegmentData [default@SegmentData] show schema; create keyspace SegmentData with placement_strategy = 'SimpleStrategy' and

Re: Upgrade Cassandra Cluster to 1.0.3

Sounds to me like https://issues.apache.org/jira/browse/CASSANDRA-3491, which was present in 1.0.2 and fixed in 1.0.3. It sounds like you're running the wrong version by mistake. On Mon, Nov 21, 2011 at 7:53 AM, Michael Vaknine wrote: > Hi, > Any help will be appreciated. > > I am upgrading Cass

Re: UUIDType

I think that's correct, but why would you want to do that? On Sun, Nov 20, 2011 at 2:55 AM, Guy Incognito wrote: > am i correct that neither of Cassandra's UUIDTypes (at least in 0.7) compare > UUIDs according to RFC4122 (ie as two unsigned longs)? > -- Jonathan Ellis Project Chair, Apache Ca

Re: split large sstable

On Mon, Nov 21, 2011 at 11:26 AM, sridhar basam wrote: > > > On Mon, Nov 21, 2011 at 10:34 AM, Edward Capriolo > wrote: > >> >> >> On Mon, Nov 21, 2011 at 10:07 AM, Dan Hendry >> wrote: >> >>> Pretty sure your argument about indirect blocks making large files >>> inefficient only pertains to ex

Re: split large sstable

On Mon, Nov 21, 2011 at 10:34 AM, Edward Capriolo wrote: > > > On Mon, Nov 21, 2011 at 10:07 AM, Dan Hendry wrote: > >> Pretty sure your argument about indirect blocks making large files >> inefficient only pertains to ext2/3 and not ext4. It seems ext4 replaces >> the >> 'indirect block' approach

Re: split large sstable

On Mon, Nov 21, 2011 at 10:07 AM, Dan Hendry wrote: > Pretty sure your argument about indirect blocks making large files > inefficient only pertains to ext2/3 and not ext4. It seems ext4 replaces > the > 'indirect block' approach with extents > ( > http://kernelnewbies.org/Ext4#head-7c5fd53118e8b8

Re: split large sstable

best regards, 韩竹(Zhu Han) 坚果铺子 , 最简单易用的云存储 同步文件, 分享照片, 文档备份! On Mon, Nov 21, 2011 at 11:07 PM, Dan Hendry wrote: > Pretty sure your argument about indirect blocks making large files > inefficient only pertains to ext2/3 and not ext4. It seems ext4 replaces > the > 'ind

RE: split large sstable

Pretty sure your argument about indirect blocks making large files inefficient only pertains to ext2/3 and not ext4. It seems ext4 replaces the 'indirect block' approach with extents (http://kernelnewbies.org/Ext4#head-7c5fd53118e8b888345b95cc11756346be4268f4 , http://en.wikipedia.org/wiki/Ext4#Fea

Upgrade Cassandra Cluster to 1.0.3

Hi, Any help will be appreciated. I am upgrading Cassandra 1.0.0 to 1.0.3 got error ERROR [CompactionExecutor:3] 2011-11-21 11:10:59,075 AbstractCassandraDaemon.java (line 133) Fatal exception in thread Thread[CompactionExecutor: 3,1,main] 3645 java.lang.StackOverflowError 3646 at com.goo

Re: Pending ReadStage is exploding on only one node

Hmm..What's the data distribution like on cluster? R.P.? On Mon, Nov 21, 2011 at 7:31 AM, Johann Höchtl wrote: > ** > I'm using hector-0.8.0-2. > No custom load balancer. > Hardware is equal on every server. > > Am 21.11.2011 13:26, schrieb Jahangir Mohammed: > > I am not so sure from version to

Re: Pending ReadStage is exploding on only one node

I'm using hector-0.8.0-2. No custom load balancer. Hardware is equal on every server. Am 21.11.2011 13:26, schrieb Jahangir Mohammed: I am not so sure from version to version. 1. Which client are you using? Any custom load balancer? 2. Is the hard

Re: Pending ReadStage is exploding on only one node

I am not so sure from version to version. 1. Which client are you using? Any custom load balancer? 2. Is the hardware on this node any different from other nodes? Thanks, Jahangir. On Mon, Nov 21, 2011 at 5:55 AM, Johann Höchtl wrote: > Hi all, > > I'm experiencing strange behaviour of my 6-no

Re: Network traffic patterns

I think ordered partitioner might cause most of the data to be saved only on a few nodes. This could contribute to what you saw. Try to use random partitioner if possible. On Mon, Nov 21, 2011 at 6:53 AM, Philippe wrote: > I'm using BOP. > Le 20 nov. 2011 13:09, "Boris Yen" a écrit : > > I am j

Re: Efficiency of Cross Data Center Replication...?

If I want RR to work, does this mean the consistency level has to be each_quorum or all? On Mon, Nov 21, 2011 at 2:29 AM, Jeremiah Jordan < jeremiah.jor...@morningstar.com> wrote: > If hinting is off. Read Repair and Manual Repair are the only ways data > will get there (just like when a single n

Pending ReadStage is exploding on only one node

Hi all, I'm experiencing strange behaviour of my 6-node cassandra cluster and I hope some one can explain, what I'm doing wrong. The setting: 6-Cassandra Nodes 1.0.3 Random Partitioning The ColumnFamily in question has a replication factor of 2 and stores products of different shops with a se

Re: data agility

"Cassandra's write path is completely optimized. It will write as fast as the disk will allow it" I don't believe this is quite true, as posted recently out-the-box compaction is switched on, compaction is often necessary, and requires significant IO.  Cassandra's compaction is okay but there is

Re: key and storage proximity

I think taht it depends on your partitioner. With an OPP you will have this behaviour. With a RP you won't have this behaviour. The hash randomize the keys, which is exactly its job to be sure that even if you are storing sequences you won't create hot spots. Alain 2011/11/21 Kent Tong > Hi, >

key and storage proximity

Hi, I was wondering if two records with "adjacent" keys are stored near-by, or with "adjacent" key hashes or neither? Thanks!

Re: read performance problem

Dear all, Sorry, I was running the wrong test. Yes, the query performance is 2,300 QPS which is pretty good.   -- Author of books for learning CXF, Axis2, Wicket, JSF (http://www.agileskills2.org) From: Jahangir Mohammed To: user@cassandra.apache.org; Kent T

Re: What sort of load do the tombstones create on the cluster?

I don't remember your exact situation but could it be your network connectivity? I know I've been upgrading mine because I'm maxing out fastethernet on a 12 node cluster. Le 20 nov. 2011 22:54, "Jahangir Mohammed" a écrit : > Mostly, they are I/O and CPU intensive during major compaction. If gang

Re: Added column does not sort as the last column

Are you certain you didn't mistakenly changed the comparator (or subcomparator) for one of your column family during the upgrade? That could typically trigger such a thing. -- Sylvain On Sat, Nov 19, 2011 at 10:00 PM, huyle wrote: > Hi, > > We got "Added column does not sort as the last column"