Hi, As usual this upcoming release brings a number of bug fixes, that alone will be reason enough to recommend the upgrade to every user.
Exciting are the two new features: Quorum tie breaker So far enabling quorum only made sense if you have a three way redundant data set. With the new quorum tie breaker feature it works with 2 way redundnt data, but needs a 3rd, diskless node in the DRBD resource. optimized meta-data access if meta-data is on PMEM PMEM (or NVDIMMs) is an exciting revolutionary change in computing. It is a new storage tier that is connected as memory to the system. One consequence of that is that software not gets the ability to access/change/update data on the storage is smaller units than whole sectors (512 bytes). We can not modify it in units of 64 bytes. That gives us a DRBD developers new possibilities in optimizing updates of our on-storage meta-data data structures. We created a new PMEM optimized layout for the activity log, and access the bitmap directly in place, as PMEM is memory mapped. As a side consequence this reduces DRBD's memory consumption. Depending on the workload you might get a 2x improvement in write IOPs and a 4x improvement in throughput. Download and run this on your testing environment. As usual we reserve one week for feedback before we tag this release as final. 9.0.18-0rc1 (api:genl2/proto:86-114/transport:14) -------- * Fix an IO deadlock under memory pressure * Fix disconnect timing in case the network connection suddenly drops all packets * Fix some misbehavior that surfaced with Ahead/Behind * Fix potential spinlock deadlock in IRQ * our quorum feature can now use the connectivity to the majority of Diskless nodes as tiebreaker * Access meta-data using DAX if it is on persistent memory (NVDIMM or PMEM); For write intense workloads this is a x2 to x4 speedup! https://www.linbit.com/downloads/drbd/9.0/drbd-9.0.18-0rc1.tar.gz https://github.com/LINBIT/drbd-9.0/tree/drbd-9.0.18-0rc1 best regards, Phil -- LINBIT | Keeping The Digital World Running DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
