n our
Cassandra adventure.
Thanks for the advice
Chris
From: aaron morton [mailto:aa...@thelastpickle.com]
Sent: 23 May 2013 23:50
To: user@cassandra.apache.org
Subject: Re: High performance disk io
I am currently trying to really study the effect of the width of a row
(being in mul
or most CF. It goes up at peak times which is what we want to avoid.
>
>
>
> We’re using Cass 1.2.4 w/vnodes and our own barebones driver on top of
> thrift. Needed to be .NET so Hector and Astyanax were not options.
>
>
>
> Do you use SSDs or multiple SSDs in a
have a dedicated SSD per large column
> family.
>
> We’re now moving all of nodes to have the same setup.
>
> ** **
>
> ** **
>
> Chris
>
> ** **
>
> *From:* Igor [mailto:i...@4friends.od.ua]
> *Sent:* 23 May 2013 15:00
> *To:* user@cassa
des to have the same setup.
Chris
From: Igor [mailto:i...@4friends.od.ua]
Sent: 23 May 2013 15:00
To: user@cassandra.apache.org
Subject: Re: High performance disk io
Hello Christopher,
BTW, are you talking about 99th percentiles on client side, or about
percentiles from cassandra hi
RAID?
Thanks
Chris
*From:*Igor [mailto:i...@4friends.od.ua]
*Sent:* 22 May 2013 15:07
*To:* user@cassandra.apache.org
*Subject:* Re: High performance disk io
Hello
What level of read performance do you expect? We have limit 15 ms for
99 percentile with average read latency near 0.9ms. For some
how it goes.
-Wei
- Original Message -
From: "Dean Hiller"
To: user@cassandra.apache.org, "Wei Zhu"
Sent: Wednesday, May 22, 2013 12:19:44 PM
Subject: Re: High performance disk io
If you are only running repair on one node, should it not skip that node? So
"user@cassandra.apache.org<mailto:user@cassandra.apache.org>"
mailto:user@cassandra.apache.org>>, Wei Zhu
mailto:wz1...@yahoo.com>>
Date: Wednesday, May 22, 2013 1:16 PM
To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>"
mailto:user@cassandra.
ny kind of configuration or RAID?
No, single SSD per host
Thanks
Chris
From: Igor [ mailto:i...@4friends.od.ua ]
Sent: 22 May 2013 15:07
To: user@cassandra.apache.org
Subject: Re: High performance disk io
Hello
What level of read performance do you expect? We have limit 15
No, single SSD per host
Thanks
Chris
*From:*Igor [mailto:i...@4friends.od.ua]
*Sent:* 22 May 2013 15:07
*To:* user@cassandra.apache.org
*Subject:* Re: High performance disk io
Hello
What level of read performance do you expect? We have limit 15 ms for
99 percentile with average read latency
same price tag easily
worth the effort.
Cheers,
Chris
-Original Message-
From: Hiller, Dean [mailto:dean.hil...@nrel.gov]
Sent: 22 May 2013 15:33
To: user@cassandra.apache.org
Subject: Re: High performance disk io
Well, if you just want to lower your I/O util %, you could always just add
were not options.
Do you use SSDs or multiple SSDs in any kind of configuration or RAID?
Thanks
Chris
From: Igor [mailto:i...@4friends.od.ua]
Sent: 22 May 2013 15:07
To: user@cassandra.apache.org
Subject: Re: High performance disk io
Hello
What level of read performance do you e
nesday, May 22, 2013 8:06 AM
To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>"
mailto:user@cassandra.apache.org>>
Subject: Re: High performance disk io
Hello
What level of read performance do you expect? We have limit 15 ms for 99
percentile with average
Hello
What level of read performance do you expect? We have limit 15 ms for 99
percentile with average read latency near 0.9ms. For some CF 99
percentile actually equals to 2ms, for other - to 10ms, this depends on
the data volume you read in each query.
Tuning read performance involved clea
Hello,
We're looking at deploying a new ring where we want the best possible read
performance.
We've setup a cluster with 6 nodes, replication level 3, 32Gb of memory, 8Gb
Heap, 800Mb keycache, each holding 40/50Gb of data on a 200Gb SSD and 500Gb
SATA for OS and commitlog
Three column fam
14 matches
Mail list logo
