Hi, with this release we fixed some performance regressions in 8.4 that trigger only when DRBD is used as block storage target. (I.e. they do not triggered when you have a file system on top of it).
When it comes to new features a lot was done that DRBD works better with thinly provisioned storage and SSDs (WRITE_SAME & resync). Look for 'rs-discard-granularity' and 'discard-zeroes-if-aligned' on the man-pages. drbd 8.4.7-1 (api:genl1/proto:86-101) ------- * introduce WRITE_SAME support * introduce discard-capable (or thinly allocated) device friendly resync * improve latency on certain kernel versions and usage patterns * improve latency of disk flushes with multiple volumes * fix recovery handling of certain multiple error scenarios, including possible deadlocks after certain multiple failure sequences * introduce unfence-peer handler, to close possible races if the replication link is flaky * avoid potential spurious full resync by * improve discard support, reliably zero-out/discard even with discard_zeroes_data=0 * update wrapper defines for linux 4.3 * fix latency regression introduced with 8.4.5 protocol A was sometimes synchronous, C sometimes double-latency * avoid potential deadlock during handshake * avoid potential deadlock in disconnect during resync with fencing resource-and-stonith * allow IO during some bitmap bulk IO operations * fix "endless" transfer log walk in protocol A http://oss.linbit.com/drbd/8.4/drbd-8.4.7-1.tar.gz http://git.drbd.org/drbd-8.4.git/tag/refs/tags/drbd-8.4.7 drbd-utils 8.9.5 -------- * add support for new disk option 'rs-discard-granularity' (module v8.4.7) * add support for new disk option 'discard-zeroes-if-aligned' (module v8.4.7) * add support for v9 "path" commands * doc improvements/corrections * improvements to drbd ocf resource agent and pacemaker "constraint based fencing" (crm-fence-peer.sh) * drbd-overview improvements http://oss.linbit.com/drbd/drbd-utils-8.9.5.tar.gz http://git.drbd.org/drbd-utils.git/tag/refs/tags/v8.9.5 cheers, Phil _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
