Date: Thu, 21 Oct 2010 13:25:34 +0100 From: Pete French <petefrench@ticketswitch.com> To: freebsd-stable@freebsd.org Subject: hast vs ggate+gmirror sychrnoisation speed Message-ID: <E1P8uD8-000Hn3-Ae@dilbert.ticketswitch.com>
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Well, I bit the bullet and moved to using hast - all went beautifully, and I migrated the pool with no downtime. The one thing I do notice, however, is that the synchronisation with hast is much slower than the older ggate+gmirror combination. It's about half the speed in fact. When I orginaly setup my ggate configuration I did a lot of tweaks to get the speed good - these copnsisted of expanding the send and receive space for the sockets using sysctl.conf, and then providing large buffers to ggate. Is there a way to control this with hast ? I still have the sysctls set (as the machines have not rebooted) but I cant see any options in hast.conf which are equivalent to the "-S 262144 -R 262144" which I use with ggate Any advice, or am I barking up the wrong tree here ? cheers, -pete.
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