Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi there I am using DRBD 0.7.21 with iSCSI Enterprise Target 0.4.14 on CentOS 4.4. When I run iSCSI direct to the LVM lv on top of hardware RAID I can get 225 MB/s over two sessions in MPIO with 256K block size, but when I put DRBD in-between iSCSI and LVM the throughput tops out at 80 MB/s and I can't seem to go over that. DRBD seems to report it's max number of sectors as 8 (4K), does that mean each io operation is limited to 4K? My hardware raid reports it's max sectors as 128, could this explain the reduction to 1/3 throughput? Ross S. W. Walker Information Systems Manager Medallion Financial, Corp. 437 Madison Avenue 38th Floor New York, NY 10022 Tel: (212) 328-2165 Fax: (212) 328-2125 WWW: http://www.medallion.com <http://www.medallion.com> ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.