Hi,
I am currently looking for suggestions on how to troubleshoot what may be going on.
I have a Windows 2012r2 server connected via a connectx-2 qdr vpi adaptor to a Voltaire 4036 ib switch and then to a Solaris 11 server via the same type of connectx-2 vpi adaptor.
I have two luns shared via iscsi targets.
5x Hitachi ultrastar 2TB drives (raidz) with a 120GB ssd zil.
2x 120GB ssd drives (stripped).
All drives are connected to a Sata III Supermicro chassis backplane and then through lsi 9211-8i HBA s (original LSI, not reflashed).
The two ib cards have been flashed with an RDMA version of their firmware as per DBA's guide.
Issues I am seeing.
Large file transfers from the iscsi mapped Hitachi drives usually hovers around 50 -》 100MB/s. It also seems to go in waves dropping to 0 for a few seconds (maybe once every 15s).
Using the ssd iscsi share and the Hitachi share at the same time compounds the 'drop to 0MB/s' issue.
Any ideas to help find out what is causing such poor performance ?.
I am currently looking for suggestions on how to troubleshoot what may be going on.
I have a Windows 2012r2 server connected via a connectx-2 qdr vpi adaptor to a Voltaire 4036 ib switch and then to a Solaris 11 server via the same type of connectx-2 vpi adaptor.
I have two luns shared via iscsi targets.
5x Hitachi ultrastar 2TB drives (raidz) with a 120GB ssd zil.
2x 120GB ssd drives (stripped).
All drives are connected to a Sata III Supermicro chassis backplane and then through lsi 9211-8i HBA s (original LSI, not reflashed).
The two ib cards have been flashed with an RDMA version of their firmware as per DBA's guide.
Issues I am seeing.
Large file transfers from the iscsi mapped Hitachi drives usually hovers around 50 -》 100MB/s. It also seems to go in waves dropping to 0 for a few seconds (maybe once every 15s).
Using the ssd iscsi share and the Hitachi share at the same time compounds the 'drop to 0MB/s' issue.
Any ideas to help find out what is causing such poor performance ?.