----- "Mathew Eis" <mathew at eisbox.net> wrote: > 1) Is the above possible with the current Gluster translators? I've > experimented with various combinations of translators, including > replicate, nufa, writebehind, and io-threads, and while I have been > able to improve performance of some operations, many others are still > taking place at WAN speed. This should be possible with the replicate translator. Replicate returns successfully to the application as soon as a write succeeds on atleast one subvolume. So, in effect, the write over WAN should happen in the background. You should also set the read-subvolume to be the local server, so that reads are served from there. However, currently there is one feature that makes a setup like this somewhat untenable. When a file is self healing, all access to it will be blocked. Self-heal over WAN could turn out to be quite slow for large files. There are two improvements planned for the 2.1 release which will make your configuration possible: 1) Self heal in the background. With this only writes to the currently self-healing region of a file will be blocked. 2) rsync algorithm for self-heal. This will be much more efficient in terms of data transferred over the network. Vikas
