We are proud to announce that the IBM XIV Host Attachment Kit has been recently upgraded to a new version - 2.5.0. This release brings support for XIV microcode version 11.6.x, IBM Spectrum Accelerate 11.5.1.x, and RHEL 7.1. In addition, this version introduces a hot feature - the host-side acceleration (HSA) for improved iSCSI communication between Spectrum Accelerate and a host.
The improvement is achieved by efficient mapping of I/O operations to modules that store the required data. In a nutshell, instead of sending data across all paths and letting the storage arrays decide on correct forwarding, the host sends data directly to the correct module. This leads to faster handling of data by the host, with improved response time and throughput.
Another change is a deprecation of the -L option of the xiv_iscsi_admin and xiv_fc_admin commands, reserving the ability to list the attached storage devices for the xiv_syslist -L command only.