Can anyone explain why Swift doesn't want to utilize page cache _at all_? On Wed, Dec 14, 2011 at 12:32 PM, Michael Barton < mike-launch...@weirdlooking.com> wrote:
> I can't explain it off the top of my head. > > I don't have a swift installation to play with at the moment, but it's > conceivable that posix_fadvise is slower than we expect (drop_cache is > called more frequently during reads than writes, iirc). That could be > tested by making drop_cache a no-op in the object server. > > Or running the object server under a profiler during both operations > might shed some light on what is taking so much time. > > --Mike > > > > On Mon, Dec 12, 2011 at 8:44 AM, Zhenhua (Gerald) Guo <jen...@gmail.com> > wrote: > > Hi, folks > > Recently, I have run some read/write tests for large files (400GB) > > in Swift. I found that writes were always faster than reads, which is > > kinda counter-intuitive. What may be the cause? > > Has anyone else seen the same problem? > > > > Gerald > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~openstack > > Post to : openstack@lists.launchpad.net > > Unsubscribe : https://launchpad.net/~openstack > > More help : https://help.launchpad.net/ListHelp > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > -- Regards Huang Zhiteng
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