Jan
08

Client Tuning Recommendations for ABS (Acropolis Block Services)

Client Tuning Recommendations for ABS (Acropolis Block Services)

o For large block sequential workloads, with I/O sizes of 1 MB or larger, it’s beneficial to increase the iSCSI MaxTransferLength from 256 KB to 1 MB.

* Windows: Details on the MaxTransferLength setting are available at the following link: https://blogs.msdn.microsoft.com/san/2008/07/27/microsoft-iscsi-software-initiator-and-isns-server-timers-quick-reference/.

* Linux: Settings in the /etc/iscsi/iscsid.conf file; node.conn[0].iscsi.MaxRecvDataSegmentLength

o For workloads with large storage queue depth requirements, it can be beneficial to increase the initiator and device iSCSI client queue depths.

* Windows: Details on the MaxPendingRequests setting are available at the following link: https://blogs.msdn.microsoft.com/san/2008/07/27/microsoft-iscsi-software-initiator-and-isns-server-timers-quick-reference/.

* Linux: Settings in the /etc/iscsi/iscsid.conf file; Initiator limit: node.session.cmds_max (Default: 128); Device limit: node.session.queue_depth (Default: 32)

For more best practices download the ABS best practice guide

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