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From Patrick Schless <patrick.schl...@gmail.com>
Subject Re: 3-Hour Periodic Network/CPU/Disk/Latency Spikes
Date Mon, 16 Dec 2013 17:11:10 GMT
Thanks for the tips. I'll play around with this this week and try to get a
script that won't affect our performance too bad. I imagine most people do
this at off-peak times, but we don't have that so we'll have to figure out
how to spread out the load as much as possible.


On Fri, Dec 13, 2013 at 6:53 PM, Vladimir Rodionov
<vrodionov@carrieriq.com>wrote:

> Available HBase API allows to compact table's regions independently.
> It can be cron job, script or client application which connects to HBase
> cluster, selects regions and trigger compaction,
> but you have to write this piece of software yourself.
>
> Best regards,
> Vladimir Rodionov
> Principal Platform Engineer
> Carrier IQ, www.carrieriq.com
> e-mail: vrodionov@carrieriq.com
>
> ________________________________________
> From: Patrick Schless [patrick.schless@gmail.com]
> Sent: Friday, December 13, 2013 4:36 PM
> To: user
> Subject: Re: 3-Hour Periodic Network/CPU/Disk/Latency Spikes
>
> Ah, sorry about the attachment (didn't realize they weren't allowed).
> Here's the picture I was trying to attach:
> http://www.plainlystated.com/hbase_major_compactions.png
>
> It sounds like you're right, Vladimir, about the compaction storm, though I
> don't understand why it's about every three hours instead of every day. In
> the book [1] I see the suggestion that they be managed manually. I don't
> see, however, any advice on what do do after turning auto-compaction off.
> Are there best practices around scheduling and monitoring the process?
>
> Thanks,
> Patrick
>
> [1]
>
> http://hbase.apache.org/book/important_configurations.html#managed.compactions
>
>
>
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