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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: sstableloader throughput
Date Wed, 10 Apr 2013 15:03:29 GMT
Yes. I did confirm that the 1.1 sstable loader works much better then the
1.0 version. The changes were not easy to backport to the 1.0.X branch so
it did not happen. It is likely that 1.2 is even better :)


On Wed, Apr 10, 2013 at 10:38 AM, Viktor Jevdokimov <
Viktor.Jevdokimov@adform.com> wrote:

> Rsync is not for our case.
>
> Is sstableloader for 1.2.x faster?
>
>
>
> From: Edward Capriolo [mailto:edlinuxguru@gmail.com]
> Sent: Wednesday, April 10, 2013 15:52
> To: user@cassandra.apache.org
> Subject: Re: sstableloader throughput
>
> Stables loader was slow in 1:0:x I had better luck with rsync. It was not
> fixed in the 1.0.x series.
>
> On Wednesday, April 10, 2013, Viktor Jevdokimov <
> Viktor.Jevdokimov@adform.com> wrote:
> > Found https://issues.apache.org/jira/browse/CASSANDRA-3668
> >
> > Weird.
> >
> >
> >
> > Hi,
> >
> >
> >
> > We're using Casandra 1.0.12 sstableloader to import data from dedicated
> machine located in DC1 into the cluster of 32 nodes (RF=4), 16 nodes in DC1
> and 16 nodes in DC2.
> >
> >
> >
> > To disable throttle for sstableloader we set in casasndra.yaml:
> >
> > stream_throughput_outbound_megabits_per_sec: 0
> >
> >
> >
> > Outgoing network throughput is about 1Gbit, file copy from dedicated
> sstableloader machine throughput is >90MB/s into DC1 node and >50MB/s into
> DC2 node.
> >
> >
> >
> > But with sstableloader outgoing network traffic is only 9MB/s, importing
> 1 sstable of 480MB into cluster (~60MB/node) takes 8-9 minutes. Even with
> 50MB/s import should take less than a minute.
> >
> >
> >
> > Why sstableloader throughput is so low/slow?
> >
>
> Best regards / Pagarbiai
>
> Viktor Jevdokimov
> Senior Developer
>
> Email: Viktor.Jevdokimov@adform.com
> Phone: +370 5 212 3063
> Fax: +370 5 261 0453
>
> J. Jasinskio 16C,
> LT-01112 Vilnius,
> Lithuania
>
>
>
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