On May 10, 2013, at 7:24 PM, Robert Coli <rc...@eventbrite.com> wrote:
> 1) What version of Cassandra do you run, on what hardware? 1.1.5 - 6 nodes, 32GB RAM, 300GB data per node, 900GB 10k RAID1, Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz. > 2) What consistency level do you write at? Do you do DELETEs? QUORUM. Yes, we do deletes. > 3) Do you run a regularly scheduled repair? Yes. > 4) If you answered "yes" to 3, what is the frequency of the repair? Every 2 days. > 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?) It works as we expect, it has some impact on performance, but it takes a long time. We used to run daily repairs, but they started overlapping. The reason for more frequent repairs is that we do a lot of deletes so we lowered the gc_grace_period otherwise the dataset would grow too large. André
