Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I know that this has been discussed many times over by the community and Linbit engineers, however, is iSCSI active/active now safely deployable on DRBD using the built in kernel scsi target (LIO)? I ask because it now supports VMWare's VAAI which is nothing more than a collection of t10 SCSI commands (it's not an API at all, why they called it that I don't know): 0x93 WRITE SAME(16) 0x41 WRITE SAME(10) 0x42 UNMAP 0x89 SCSI COMPARE and WRITE - ATS 0x83 EXTENDED COPY The SCSI COMPARE AND WRITE command is used by clustering aware applications for resource locking, for example ESXi - therefore if your initiator is ESX's iSCSI Initiator and your target (LIO) supports VAAI then you can run active/active iSCSI on DRBD with no problems? More on VAAI and SCSI Persistent Reservations: http://www.quadstor.com/tech-library/134-high-availability-with-synchronous-mirroring.html Myles Exitex Limited Mountpleasant Dundalk Co Louth Ireland Tel: +353 (0) 42 93 71244 Fax: +353 (0) 42 93 71221 * E-mail: myles.gray at exitex.com CONFIDENTIALITY NOTICE. This email is private and confidential and may contain legally privileged information. If you are not named as an addressee it may be unlawful for you to read, copy, distribute, disclose or otherwise use the information contained in this email. If you are not the intended recipient of this email please destroy this communication and contact: myles.gray at exitex.com Any views or opinions presented are solely those of the author and do not necessarily represent those of the company unless otherwise stated. The contents of any attachment to this email may contain software viruses which may damage your computer system. Exitex Limited has taken all reasonable precautions to minimise any risk, but cannot accept responsibility for any damage which may be sustained as a result of any such viruses. The recipient should conduct their own virus checks before opening any attachment to this email. Please note that Exitex LTD may monitor email traffic data and also the content of email for the purposes of security and staff training. This footnote also confirms that this email message has been swept for the presence of computer viruses.