Fencing is the process of isolating a node from a computer cluster or protecting shared resources when a node appears to be malfunctioning. As the number of nodes in a cluster increases, so does the likelihood of failure.1
By using the Pacemaker 1.1.15 release, the LINBIT cluster stack has been cutting-edge. Now the distributions are catching up.
TL;DR: Pairing DRBD with VDO reduces the replication network and storage utilization by ~85% while increasing load by ~0.8. VDO (Virtual Data Optimizer) is a ready-to-run software package that delivers block-level deduplication, compression, and thin provisioning capabilities to Linux. VDO operates inline at a 4 KB granularity, delivering the best possible balance of performance and […]
We have been testing out some 240GB Micron M500DC SSDs with DRBD 9 and DRBD’s RDMA Transport layer. Micron, based in Boise Idaho, is a leader in NAND, flash production and storage. We found that that their M500DC SSD’s are write optimized for data center use cases and in some cases exceeded the expected performance.
Nowadays, Docker has support for plugins; for LINBIT, volume plugins are certainly the most interesting feature. Volume plugins open the way for storing content residing in usual Docker volumes on DRBD backed storage. In this blog post we show a simple example of using our new Docker volume plugin to create a WordPress powered blog […]
As an update to the previous post, we now have the Tech Guide for RDMA performance with non-volatile storage available online. Just head over to the LINBIT Tech Guide area and read the HGST Ultrastar SN150 NVMe performance report! (Free registration required.)