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From Viktor Jevdokimov <>
Subject RE: (unofficial) Community Poll for Production Operators : Repair
Date Tue, 14 May 2013 13:10:08 GMT
> 1) What version of Cassandra do you run, on what hardware?
1.0.12 (upgrade to 1.2.x is planned)
Blade servers with
  1x6 CPU cores with HT (12 vcores) (upgradable to 2x CPUs)
  96GB RAM (upgrade is planned to 128GB, 256GB max)
  1x300GB 15k Data and 1x300GB 10k CommitLog/System SAS HDDs

> 2) What consistency level do you write at? Do you do DELETEs?
Write/Delete failover policy (where needed): try QUORUM then ONE finally ANY.

> 3) Do you run a regularly scheduled repair?
NO, read repair is enough (where needed).

> 4) If you answered "yes" to 3, what is the frequency of the repair?
If we'll do it, we'll do it once a day.

> 5) What has been your subjective experience with the performance of
> repair? (Does it work as you would expect? Does its overhead have a
> significant impact on the performance of your cluster?)
For our use case it has too much significant impact on performance of the cluster without
real value.

Best regards / Pagarbiai

Viktor Jevdokimov
Senior Developer

Phone: +370 5 212 3063
Fax: +370 5 261 0453

J. Jasinskio 16C,
LT-01112 Vilnius,

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