Hi, I've recently being testing a newer updated kernel of XStreamOS, mainly on storage features. I'm using a very bare test machine on pourpose, to check limiations. The machine just have one boot disk and one SATAII data disk, one 1GB and a dual 10GB eth interface. I am not still sure if there are other things affecting, but before delving into hardware/driver issues, I want to be sure there are no other kernel things around. What happens is about two same installation with different kernels: - same bare installation of XSOS, one with kernel April 2012, one with kernel of October 2014 - using 1GB eth for maintenance (ssh, web interface ecc.) - dedicate 2 10GB for SAN, with two dedicated networks - created simple pool on the data disk, just one SATAII disk, expected iops around 50MB/s - created TPG on both 10GB and tagged the server iqn on them - shared one vol as iscsi , with sync as standard - mounted the vol from VMware on the correct 10GB network - installed a windows machine with vmdk on the vol Results are strange: - the old 2012 installation works almost at 50MB/s, as can be expected by SATAII disks - the new 2014 installation works between 4-12MB/s ! I'm almost sure there is nothing else different, but the kernel version. Obviously, if I disable sync, or if I add an ssd zil to the pool, they both work up to 50MB/s So, my question is (before investigating other stuff): is there any known change on the kernel work on iscsi that changes default behaviour of sync or what else? I also tried to share a windows guest share, moving data on it always at 50MB/s on both systems Any idea? Gabriele Sonicle S.r.l. Gabriele Bulfon Tel +39 028246016 - Fax +39 028243880 via Santa Maria Valle 3 - 20123 - Milano - Italy http://www.sonicle.com
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