LINBIT Introduces Container-Native Storage for Enterprise Applications

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New Open-Source Software-Defined Storage Available for Kubernetes and OpenShift Environments. “LINSTOR is designed to be container-native while consolidating storage and data management which saves time and money for IT departments,” said Brian Hellman, COO of LINBIT. LINBIT, the de facto standard in open source High Availability (HA), Disaster Recovery (DR), Software-Defined Storage (SDS), and the […]

RDMA Performance with Real Storage

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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.)

RDMA Performance

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As promised in the previous RDMA post, we gathered some performance data for the RDMA transport. Read and enjoy!

RDMA paths

As a follow-up to the previous post, here are some more technical details about DRBD 9 transports. RDMA can use multiple paths at the same time – as in High Availability *and* bandwidth aggregation. The planned SCTP will provide multiple links for HA, too TCP can’t either.

Performance numbers for DRBD

This post shows performance numbers for a pair of Dell PowerEdge R720 (0VWT90), with 24 logical CPUs (E5-2640 0 @ 2.50GHz) and storage on a Fusion-io ioDrive2 (1.2TB). Typical values without DRBD (repeated a few times, nearly no variation): # Reading: # dd if=/dev/fioa of=/dev/zero bs=16M count=1k iflag=direct 1024+0 records in 1024+0 records out 17179869184 […]

Pacemaker and dampen interval

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http://lists.linux-ha.org/pipermail/linux-ha/2011-May/043010.html http://www.gossamer-threads.com/lists/linuxha/dev/75722#75722

Benchmarking DRBD

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We often see people on #drbd or on drbd-user trying to measure the performance of their setup. Here are a few best practices to do this.