Posts

DRBD 9 over RDMA with Micron SSDs

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.

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Having Fun with the DRBD Manage Control Volume

As you might know, DRBD Manage is a tool that is used in the DRBD9 stack to manage (create, remove, snapshot) DRBD resources in a multi-node DRBD cluster. DRBD Manage stores the cluster information in the so called Control Volume. The control volume is a DRBD9 resource itself which is then replicated across the whole cluster. This means that the control volume itself is just a block device, like all the regular DRBD resources. Read more

DRBD and SSD: I was made for loving you

When DRBD 8.4.4 integrated TRIM/Discard support, a lot of things got much better… for example, 700MB/sec over a 1GBit/sec connection. Read more

DRBDManage release 0.10

As already announced in another blog post, we’re preparing a new tool to simplify DRBD administration. Now we’re publishing its first release! Read more

DRBD-Manager

One of the projects that LINBIT will publish soon[1. With an Open Source license; GIT will be the preferred way to help us.] is drbdmanage, which allows easy cluster-wide storage administration with DRBD 9. Read more

“umount is too slow”

A question we see over and over again is

Why is umount so slow? Why does it take so long?

Part of the answer was already given in an earlier blog post; here’s some more explanation. Read more

Backup ideas: using a double-stacked setup

Have you ever wanted to do a file based backup of your data without impacting
your application, and without stopping your HA replication? Here is one
possible method. Read more

Mirrored SAN vs. DRBD

Every now and then we get asked “why not simply use a mirrored SAN instead of DRBD”? This post shows some important differences. Read more

LINBIT participates in the German Cloud (“Deutsche Wolke”)

Deutsche Wolke, Logo

Deutsche Wolke (“German Cloud”) was founded to establish Federal Cloud Infrastructure in Germany.

This infrastructure will provide additional legal and security protections for hosted data.  No longer will small businesses be exposed to the legal risk of losing their website presence without a trial (an unfortunate reality when doing business on transatlantic clouds).

The natural partner for backend storage infrastructure is LINBIT; as authors and maintainers of DRBD, we are best suited to provide the technical expertise to achieve High Availability.  Also, DRBD Proxy is the obvious choice for off-site or disaster recovery replication (from the office into the cloud).

We at LINBIT look forward to seeing this project grow and prosper!