Hi, Am Donnerstag, 7. August 2008 14:28 schrieb Alex: > I would like to build a SAN using cheap hardware. > Let say that we have N computers (N>8) exporting their volumes (volX, where > X=N) using ataoe or iscsi or gnbd protocol. Each volX is arround 120GB. i'm in a similar situation. I've a setup with gnbd (with "No Cluster" configuration) and i'm trying to switch to aoe, because i read that aoe should perform better. Well, my tests indicate a very poor performance for aoe! I setup gnbd without great hassle and tweaking. Performance is as fast as the network and the disks can handle. First, with aoe i had very poor performance. I had to use latest aoe module, latest vblade and a lot of network tweaking (jumbo frames, ..) to have nearly the performance from gnbd. OK, with reads i'm a litter faster with aoe. But the drawback is that vblade needs a lot more cpu than gnbd_serv! So if you export more than one block device with aoe your performance will drop. [..] > Cons: > - Using iSCSI also allows a much more seemless transition to a hardware > shared storage solution later on > - GNBD seems to be slower then ISCSI and lot of work that needs to be done > for GNBD to reach its full speed potential. Have you tested this? As far as i can tell (my tests are over two years old) iscsi needed much more cpu and had less performance than gnbd. -- greetings eMHa
Attachment:
pgpmdAPaZwnVK.pgp
Description: PGP signature
-- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
