count
> table and update both the total and the last_tx_id. You can then delete
> ledger entries if needed. Don’t forget to ensure that only one client
> thread is doing this at a time.
>
> Hope that helps.
> Aaron
>
>
> -
> Aaron Morton
> New Ze
Hi All.
I have a system thats going to make possibly several concurrent changes to
a running total. I know I could use a counter for this. However I have
extra meta data I can store with the changes which would allow me to reply
the changes. If I use a counter and it looses some writes I can't rec
y/communityserver-components-postattachments/00-09-20-52-14/BuildingOnQuicksand_2D00_V3_2D00_081212h_2D00_pdf.pdfparticularly
> section 6.2)
> - use a TTL to keep the table tame if it's high volume
>
> This 'immutable' approach plays much nicer with Cassandra's strong points.
>
>
> On Sun,
Hi All,
I have a table which has one column per user. It revives at lot of updates
to these columns through out the life time. They are always updates on a
few specific columns Firstly is Cassandra storing a Tombstone for each of
these old column values.
I have run a simple select and seen the fo
If you are worried about the over head of malicious bulk registration, you
could develop some rate limiting to restrict the sign ups to X signups per
hour from the same IP. Also you could use a CAPTCHA system to make lots of
requests hard to create.
The other thing that works well is automating th
Hi All,
I have single node cluster I use for development on my local machine. After
apt package upgrades and hard reboots the node takes a very long time to
restart.
The node will always eventually come back up however it takes ages
sometimes. It seems to be CPU bound as all 4 cores are maxed out
11:11 PM, Robert Coli wrote:
> On Thu, Jan 9, 2014 at 1:42 PM, Charlie Mason wrote:
>
>> There are a lot more reads than writes on this particular table. All of
>> the queries are just for the partition key. Most of the queries are for
>> partition keys that don't ex
Hi All,
Does anyone have any suggestions about how to improve performance in the
below use case?
I have a very simple table with a single Partition Key, and one Cluster
key. My app is periodically writing new entries in the table and deleting
old ones.
There are a lot more reads than writes on t
On Wed, May 26, 2010 at 7:45 PM, Dodong Juan wrote:
>
> So I am not sure if you guys are familiar with OCM . Basically it is an ORM
> for Cassandra. Been testing it
>
In case anyone is interested I have posted a reply on the OCM issue
tracker where this was also raised.
http://github.com/charlie
Hi All,
This is a just quick post to announce OCM 0.6.0.
This release provides compatibility with Hector 0.6 and therefore
Cassandra 0.6. The API hasn't changed so all you need to do is
recompile your OCM Spec files using the latest version of the compiler
and use the latest version of the Base L
On Wed, Mar 24, 2010 at 5:07 PM, Peter Chang wrote:
> Hector is the way to go if you're using java. I'm using it right now and
> it's made things worlds easier.
> The reason why it wasn't bundled was because it's a separate and relatively
> new project. I think it's under a month old and it was do
o remember to implement it everywhere you might update that
column.
Charlie M
> On Mon, Mar 22, 2010 at 12:07 AM, Charlie Mason
> wrote:
>>
>> Hi All,
>>
>> I am going to be using Cassandra for a project I am working on. To
>> enable me to use it more easily
Hi All,
I am going to be using Cassandra for a project I am working on. To
enable me to use it more easily I have built a relatively simple ORM
to simplify access to Cassandra and to provide some extra
functionality. When I say ORM I am not talking about developing a
Hibernate for Cassandra, OCM i
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