Posts

Would you want to be your own car mechanic?

Data seems to be on everyone’s mind these days.  From employee to financial data, your company has to keep it available through seamless replication — without downtime. LINBIT DRBD is the open source software that ensures High Availability for your enterprise.

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Testing SSD Drives with DRBD: Intel DC 3700 Series

Over the next few weeks we’ll be posting results from tests that we’ve run against various manufactures SSD drives; including Intel, SanDisk, and Micron, to name a few.

The first post in this series goes over our findings of the Intel DC S 3700 Series 800GB SATA SSD drives. Read more

Maximum volume size on DRBD

From time to time we get asked things like this:

I want to use a 10TiB volume with DRBD, is that supported”?

The easiest way to answer things like that is to say look for yourself on the public DRBD usage page – the biggest public device size is ~220TiB, so go figure 😉 Read more

DRBD causes too much CPU-load

The TL;DR version: don’t use data-integrity-alg in a production setup. Read more

Increase vm.min_free_kbytes for better OOM resistance

Depending on your setup and your workload (eg. within a virtual machine with little memory and much I/O) you could get into the situation that the kernel has little memory left, so wants to write some dirty pages to disk, but cannot, because for that it would need some memory free! Read more