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From: | Gordan Bobic |
Subject: | Re: [Gluster-devel] Architecture advice |
Date: | Mon, 12 Jan 2009 12:32:15 +0000 |
User-agent: | Thunderbird 2.0.0.19 (X11/20090107) |
Daniel Maher wrote:
Basavanagowda Kanur wrote:I am curious to know how the client decides which of the subvols to use at any given time, and if there is a way to specify a "preferred" subvol. For example, i have two servers AFR'ing each other. I have two clients set up to access the AFR cluster via HA. For reasons of resource distribution, i would like Client01 to prefer to use Server01, and Client02 to prefer to use Server02. currently HA does not provide facility for specifying this option.How does the HA translator choose a node, exactly ? Does it randomly select one from the list of available subvolumes, or does it pick them in the order they're specified in the config file, or some other way entirely ?
Not sure what the default is, but you can specify a preferred read server (writes have to go to all servers regardless) with
"option read-subvolume" in the volume spec. Gordan
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