On 07/05/2012 11:08, Liu Yuan wrote: > On 05/07/2012 04:56 PM, David Douard wrote: > >> Hi, >> >> I'm beginning to look at the debian package for sheepdog (which ships >> 0.2.4 only). For now, the package only support corosync. I am wondering >> if the zookeeper backend should be supported in debian. >> >> What are the differences between zookeper and corosync for managing a >> sheepdog cluster? >> > > > Both corosync and zookeeper (and Accord too) are used to manage > memebership and broadcast messages to the cluster nodes. > > Corosync can only works reliably with less than 15 nodes in our testbed, > due to its implementation and design goal for small sized cluster. > > If we want to add more nodes into sheepdog cluster, we should run > sheepdog against zookeeper. We (from Taobao.com) have been working with > the scalability of the sheepdog and currently running with around 1000 > nodes in our test environment. For several month expediencies with > zookeeper, we have found that it works well for node number below 1000, > with object cache enabled. > > For a cluster more than 1000 nodes, I think Accord would come up to our > rescue, but it is currently in a unstable development state. When the > sheepdog scales up to 1000 nodes reliably, we might go to look at Accord > and refine it to be a working state. > Thanks for these informations. I've added a wiki page with them. If one can add some more documentation on how to setup and use zookeeper or Accord, it would be great. David > Thanks, > Yuan > -------------- next part -------------- A non-text attachment was scrubbed... Name: david_douard.vcf Type: text/x-vcard Size: 246 bytes Desc: not available URL: <http://lists.wpkg.org/pipermail/sheepdog/attachments/20120507/8f8a9a3b/attachment.vcf> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 262 bytes Desc: OpenPGP digital signature URL: <http://lists.wpkg.org/pipermail/sheepdog/attachments/20120507/8f8a9a3b/attachment.pgp> |