Sorry for the previous question of pound connections limit! It caused by OS limit instead of Pound!
Thanks Hugo Kuo 從我的 iPhone 傳送 "Reddin, Tim (Cloud Services)" <[email protected]> 於 2011/9/20 上午12:24 寫道： > Jay wrote: > > > > >> > > FYI, some folks have done some performance testing of Glance with > > Swift backends. It was determined that using SSL caused a dramatic > > performance degradation (roughly decreased the network I/O throughput > > by half, with a queuing behvaiour showing up on GET requests as well.) > > > > The solution was to disable zlib compression in SSL on the Glance API > > server box. > > << > > > > Our initial tests used an image dervied from /dev/urandom which was an > absolute worst case for compression. > > > We found subsequently that using ZLIB with real images did provide “some” > benefit (up to ~30 – but depends on image content). We also tried using LZO > which gave up to 400% with a stock Ubuntu image (1.45GB). We will publish > something on this when we have a more complete picture. > > As Jay points out – replacing the compression algorithm is not easy. > > > Tim > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Jay Pipes > Sent: 19 September 2011 16:39 > To: Kuo Hugo > Cc: [email protected] > Subject: Re: [Openstack] Load Balancers for Swift Proxy-servers ----why Pound > ? > > > > On Mon, Sep 19, 2011 at 7:47 AM, Kuo Hugo <[email protected]> wrote: > > > btw , most of articles just using HTTP instead of HTTPS. Does Pound better > > > than Nginx under HTTPS? > > > > FYI, some folks have done some performance testing of Glance with > > Swift backends. It was determined that using SSL caused a dramatic > > performance degradation (roughly decreased the network I/O throughput > > by half, with a queuing behvaiour showing up on GET requests as well.) > > > > The solution was to disable zlib compression in SSL on the Glance API > > server box. > > > > There aren't a whole lot of easy ways to do this in OpenSSL 0.9.8, but > > you may find the discussion in this article interesting: > > > > http://journal.paul.querna.org/articles/2011/04/05/openssl-memory-use/ > > > > Cheers, > > jay > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~openstack > > Post to : [email protected] > > Unsubscribe : https://launchpad.net/~openstack > > More help : https://help.launchpad.net/ListHelp
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