On Tue, Jul 09, 2013 at 11:24:03AM -0500, Cliff Wickman wrote: [..] > UV2000 memory: 734G > makedumpfile: makedumpfile-1.5.4 > kexec: git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git > booted with crashkernel=1G,high crashkernel=192M,low > non-cyclic mode > > write to option init&scan sec. copy sec. dump size > ------------- ----------------- ---- --------- --------- > megaraid disk no compression 19 91 11.7G > megaraid disk zlib compression 20 209 1.4G > megaraid disk snappy compression 20 46 2.4G > megaraid disk snappy compression no mmap 30 72 2.4G > /dev/null no compression 19 28 - > /dev/null zlib compression 19 206 - > /dev/null snappy compression 19 41 - > > Notes and observations > - Snappy compression is a big win over zlib compression; over 4 times faster > with a cost of relatively little disk space. Thanks for the results Cliff. If it is not too much of trouble, can you please also test with lzo compression on same configuration. I am curious to know how much better snappy performs as compared to lzo. Thanks Vivek
