Task #3112
closed
Write a blog post with a recipe on how to reclaim a disk space used by MongoDB
0%
Description
A common problem, especially in heavily loaded cases, is that MongoDB can use much more disk space than it needs after some time. And users are willing to reclaim disk space when it happens.
MongoDB docs: https://docs.mongodb.com/manual/reference/command/repairDatabase/#repairdatabase-wrappers
The suggestion is to write a blog post showing a recipe in the format of shell script which will:
- remind/suggest to make a backup
- perform checks
-- pulp services are stopped
-- mongod is not running
-- there is enough disk space (according to docs, twice of the used space + 2GB) to perform mongod --repair
- as a mongodb user, run mongod --repair (with additional parameters if needed)
- print to the stdout how much space was used before and after a repair.
Make sure, script works for MongoDB 2.6 (it's a default version for RHEL7).
Updated by mhrivnak almost 6 years ago
- Groomed changed from No to Yes
Looks good to me. This is a very common concern among users, so it is valuable for us to make this known as a way to reclaim space.
Updated by ttereshc almost 6 years ago
Alternative suggestion which came up during sprint planning and discussed later with bmbouter:
- add to the Pulp docs a general idea how to reclaim disk space and a link to MongoDB docs
- create a full recipe/script for MongoDB 2.4 and post it in Pulp blog
It gives users a script to work with and they can adapt it to their MongoDB version if needed.
At the same time there is no need to maintain and keep up to date the script in Pulp docs which can be an issue.
Any thoughts or objections?
If not, I'll update the description.
Updated by ttereshc almost 6 years ago
- Subject changed from Add a recipe to the docs to reclaim a disk space used by MongoDB to Write a blog post with a recipe on how to reclaim a disk space used by MongoDB
- Description updated (diff)
I've updated description according to comment#6
Updated by jortel@redhat.com over 5 years ago
- Sprint/Milestone changed from 53 to 54
Updated by daviddavis over 5 years ago
- Status changed from NEW to ASSIGNED
- Assignee set to daviddavis
Updated by daviddavis over 5 years ago
- Status changed from ASSIGNED to POST
Updated by daviddavis over 5 years ago
I'm a bit hesitant to write a script that users can run to reclaim space since there are things users need to be aware of before they run repair. I worry that they'll be tempted to just run the script without noticing that it'll take a long time or that they need to backup first. Also, it's really just a single command they need to run to reclaim space. So I wrote the blog post as a guide to reclaiming space. Feel free to let me know if you disagree though.
Updated by jortel@redhat.com over 5 years ago
- Sprint changed from Sprint 33 to Sprint 34
Updated by daviddavis over 5 years ago
- Status changed from POST to CLOSED - COMPLETE
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