Hi Ben, Thanks for the reply. I will look into this parameters will do the internal testing and let you know the results. Regards, Muneendra. -----Original Message----- From: Benjamin Marzinski [mailto:bmarzins@xxxxxxxxxx] Sent: Wednesday, December 21, 2016 9:40 PM To: Muneendra Kumar M <mmandala@xxxxxxxxxxx> Cc: dm-devel@xxxxxxxxxx Subject: Re: deterministic io throughput in multipath Have you looked into the delay_watch_checks and delay_wait_checks configuration parameters? The idea behind them is to minimize the use of paths that are intermittently failing. -Ben On Mon, Dec 19, 2016 at 11:50:36AM +0000, Muneendra Kumar M wrote: > Customers using Linux host (mostly RHEL host) using a SAN network for > block storage, complain the Linux multipath stack is not resilient to > handle non-deterministic storage network behaviors. This has caused many > customer move away to non-linux based servers. The intent of the below > patch and the prevailing issues are given below. With the below design we > are seeing the Linux multipath stack becoming resilient to such network > issues. We hope by getting this patch accepted will help in more Linux > server adoption that use SAN network. > > I have already sent the design details to the community in a different > mail chain and the details are available in the below link. > > [1]https://urldefense.proofpoint.com/v2/url?u=https-3A__www.redhat.com_archives_dm-2Ddevel_2016-2DDecember_msg00122.html&d=DgIDAw&c=IL_XqQWOjubgfqINi2jTzg&r=E3ftc47B6BGtZ4fVaYvkuv19wKvC_Mc6nhXaA1sBIP0&m=vfwpVp6e1KXtRA0ctwHYJ7cDmPsLi2C1L9pox7uexsY&s=q5OI-lfefNC2CHKmyUkokgiyiPo_Uj7MRu52hG3MKzM&e= . > > Can you please go through the design and send the comments to us. > > > > Regards, > > Muneendra. > > > > > > References > > Visible links > 1. > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.redhat.com_ar > chives_dm-2Ddevel_2016-2DDecember_msg00122.html&d=DgIDAw&c=IL_XqQWOjub > gfqINi2jTzg&r=E3ftc47B6BGtZ4fVaYvkuv19wKvC_Mc6nhXaA1sBIP0&m=vfwpVp6e1K > XtRA0ctwHYJ7cDmPsLi2C1L9pox7uexsY&s=q5OI-lfefNC2CHKmyUkokgiyiPo_Uj7MRu > 52hG3MKzM&e= > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.redhat.com_ma > ilman_listinfo_dm-2Ddevel&d=DgIDAw&c=IL_XqQWOjubgfqINi2jTzg&r=E3ftc47B6BGtZ4fVaYvkuv19wKvC_Mc6nhXaA1sBIP0&m=vfwpVp6e1KXtRA0ctwHYJ7cDmPsLi2C1L9pox7uexsY&s=UyE46dXOrNTbPz_TVGtpoHl3J3h_n0uYhI4TI-PgyWg&e= -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
