For MongoDB data directories only XFS is recommended. The ext4 filesystem isn’t so bad but when there are a very, very high number of random accesses (which WiredTiger can reach) it can hit a bottleneck. To be fair most deployments will never hit this bottleneck, but it does remain an official production recommendation of […]
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I’ve been involved with MongoDB for quite a while now. I follow it from the code and I’ve been reviewing the changes in the 4.3 development version, plus the recent 4.4 release candidate versions rc0 – rc7.
There are a few thousand github commits, but at the human scale, you’d say 100 ~ 200 things […]
In this blog post, we will discuss how to deal with jumbo chunks in MongoDB.
Scenario: You are a MongoDB DBA, and your first task of the day is to remove a shard from your cluster. It sounds scary at first, but you know it is pretty easy. You can do it with a simple […]
Percona Backup for MongoDB v1.2 is out! In a nutshell it offers (much) faster compression choices, backup cancellation, and assorted convenience features such as a universal backup deletion command and progress logging.
And, for the DBAs out there in the field, we’ve added a whole extra binary (pbm-speed-test) that will give a quick way to […]
Introducing a new MongoDB Storage Engine
Q. What is the Heterogeneous-memory Storage Engine?
A key value store library developed (and open-sourced) by Micron that will work with any normal storage but works especially well with emerging SSDs or NVDIMMS (or other Storage Class Memory) that have faster even NVM media in them (Bleeding-edge NAND, or Optane […]
