Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
It's been running all night, and still at: Discarding device blocks : 60297216/322122752 -- Eric Robinson Chief Information Officer Physician Select Management, LLC 775.885.2211 x 112 > -----Original Message----- > From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user- > bounces at lists.linbit.com] On Behalf Of Eric Robinson > Sent: Monday, July 31, 2017 2:33 AM > To: Robert Altnoeder <robert.altnoeder at linbit.com>; drbd- > user at lists.linbit.com > Subject: Re: [DRBD-user] Discarding device blocks very slow > > For what it's worth: > > 1. Discard is enabled and working on both nodes. > 2. No messages about trim or discard in the logs. > 3. Network latency is sub-1 millisecond, bandwidth is 1 Gbit (utilization about > 10%). > 4. Drbd is version 9.0.8 on both nodes. > > -- > Eric Robinson > > > > -----Original Message----- > > From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user- > > bounces at lists.linbit.com] On Behalf Of Robert Altnoeder > > Sent: Monday, July 31, 2017 2:17 AM > > To: drbd-user at lists.linbit.com > > Subject: Re: [DRBD-user] Discarding device blocks very slow > > > > On 07/31/2017 10:46 AM, Eric Robinson wrote: > > > But that still does not explain why discards across the network are so > slow. > > > > There are lots of possible reasons. > > Discard might not be enabled on both nodes, there should be a message > > about discard being available or unavailable in the logs. IIRC, if it > > can't discard, it will zero-out. > > The network may have too high latency or too low bandwidth. > > Without a great amount of detailed information all one can do about > > performance-related issues is to guess. > > > > Generally, both nodes should be running the same and most recent > > version of DRBD 9, because all those features have been added quite > > recently, and lots of enhancements and fixes are still applied to the code. > > > > -- > > Robert Altnoeder > > +43 1 817 82 92 0 > > robert.altnoeder at linbit.com > > > > LINBIT | Keeping The Digital World Running DRBD - Corosync - Pacemaker > > f / t / in / g+ > > > > DRBD(r) and LINBIT(r) are registered trademarks of LINBIT, Austria. > > _______________________________________________ > > drbd-user mailing list > > drbd-user at lists.linbit.com > > http://lists.linbit.com/mailman/listinfo/drbd-user > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user