Delete directory with many files?

[ObiTobi]

Hello,

how can I delete a directory with many files?
My Mac create for Timemachine a "Sparsebundle" (thats a special OSX Image). On filesystem its a big directory with many files. After 6 Months it was here here 450.000 files in one directory.
Then the TM told the backup must be deleted. After 3 days trying delete the directory FreeNAS has been crashed and the discs could not be mounted after a further 2 days. I had to format both drives (mirror) and create a new ZFS volume.

After this incident, my trust is much weakened in ZFS. This is something I can not need it again.
Any hints what was or is wrong here?

 

[pirateghost]

I'm going to guess it's not a ZFS problem as much as it is an afp problem.

Personally I use the command line because it's the quickest way for me to do tasks like this

 

[rs225]

How big are your drives? Do you know how full the ZFS pool was?

450,000 files * 8MB per file (typical granularity for Time Machine) is 3.6TB. Could also be about 1.8TB if you have the tiny dot files. Any snapshots on there?

 

[anodos]

You need to create a dataset with a quota on it for your time machine volume. Otherwise time machine will fill your pool to 100% over time. What are your hardware specs?

 

[ObiTobi]

I have for Time Machine 2 Drives (Mirror) with 3TB. The volume had about 90 GB free.
Board - Asrock FM2A85X-ITX A85 RG SI
CPU - AMD A10-5700 – 3,40 GHz – Socket FM2
RAM D316GB 1866-10 Ares LP K2 GSK (16 GB)

2 ZPools

1. with 5 drives 4 TB as zpool2
2. with 2 drives 3 TB as mirror

zpool2 has after crash new config with lz4 compression. And no I had no snapshots here.

Why do I need a quota if I run only Time Machine on this one volume?

 

[warri]

Because:

Otherwise time machine will fill your pool to 100% over time.

A completely filled pool causes all kinds of problems due to the copy-on-write nature of ZFS.
For example, it's impossible to delete files without using a hack when the pool is full. Also the performance of the pool will decline significantly after a certain threshold is reached (can't remember the exact percentage, something between 85 and 95%).

 

[ObiTobi]

For example, it's impossible to delete files without using a hack when the pool is full.

Can you please write a little bit more about this "hack"?

 

[cyberjock]

Can you please write a little bit more about this "hack"?

Please search the forums, this has been discussed far far too many times already.

Thanks.

 

[Ericloewe]

Can you please write a little bit more about this "hack"?

Let's just say it's the kind of situation to be avoided at all costs. It's a situation you shouldn't even contemplate being in.