Mark Post wrote on 17.09.2015 17:19:18: > >>> On 9/17/2015 at 10:34 AM, Neale Ferguson <[email protected]> wrote: > > The new zEDC does the equivalent of gzip -1 > > Note that this _optional_ feature was introduced with the zEC12 and > zBC12, so you have to be using one of those, or a z13. (The new > LinuxONE systems are re-branded z13 and zBC12 systems, so they will > also have the option to have the feature installed.) > > Linux support for the zEDC was introduced with SLES12. Not sure > when Red Hat included it, but it was probably RHEL 7.0.
Working on getting this into RHEL 7.x. Source-code-wise, it is the same PCI device driver (not s390x-specific). The latest IBM Java code provides support through the java.util.zip classes (use the constructor to set larger buffer sizes like 64k or 256k to get best performance; specifically decompression does not improve otherwise). Please refer to http://www-01.ibm.com/support/knowledgecenter/SSYKE2_7.0.0/com.ibm.java.lnx.70.doc/user/power_compression.html?lang=en for Java documentation and minimum SR level. Experimental user space code is at https://github.com/ibm-genwqe/genwqe-user , if you are willing to spend time playing with it. Thanks, Utz :wq ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
