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jaybios
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Re: ReFS state post September 2018 Windows Updates

Post by jaybios » Mar 11, 2019 8:06 am

Interesting, well I got a full backup on the weekend, both to disk and to tape with defragment and compact turned off. I'll check my tapes today to ensure I could restore from those if needed, then i'll be able to change the block size. Before i do that though, i'll turn defragment and compact back on and just see if removing the SCCM client was the difference.

What were the symptoms of the issues people were actually seeing with the SCCM client installed?

dcampregher
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Re: ReFS state post September 2018 Windows Updates

Post by dcampregher » May 10, 2019 12:26 am

Hello guys!

I am running many customers with the 2457 version of the refs.sys without any problem, even in small servers. Now after the windows update the driver is up to date 2515 and still running stable.

In you cases/environments is this the situation?

mkretzer
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Re: ReFS state post September 2018 Windows Updates

Post by mkretzer » May 10, 2019 5:26 am

What is "stable"? We never had crashes in the past 1 1/2 years, still even now our Windows Server 2019 IO grinds to a halt as soon as there are enough TB beeing deleted and the system is nearly unresponsive. REFS takes alot of RAM in these situations.

Our REPO is 600 TB, perhaps thats the issue. RAM is 768 TB dedicated to Veeam - i really hoped that would be enough but the REFS driver does not seem to really utilize > 100 GB.

We tried disabling per-VM (seems to help somewhat but slows merges and fulls) and have the latest patches...

dcampregher
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Re: ReFS state post September 2018 Windows Updates

Post by dcampregher » May 10, 2019 10:54 am 1 person likes this post

My question is about if the repository with ReFs is running whithout problems for other peoples because for me it is all right from the last year since the 2457 driver.
No problems for me with ReFS, I wish only hear other opinions. :-)

backupquestions
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Re: ReFS state post September 2018 Windows Updates

Post by backupquestions » Jul 02, 2019 1:12 am

I've got a 50TB refs 64k block volume on Server 2016. I took a few backups to it, and then had Veeam delete them. The volume has only about 5gb of files in it if I go to properties on the folders.

When I take properties of the entire volume, I show almost 300gb used.... This might lineup with the previous backups that I have since deleted, but it might not have been even that much. Either way, does ReFS take time to free up space that is deleted?? Or does it just mark those blocks as useable again?

edit: I've tested adding regular files such as an .iso of 4gb.... I remove that iso and the counter increments and then goes back down as it should. Yet the original space usage is not leaving. So it seems like Veeam backup files that it deleted are not being removed from the volume as far as clearing the space... I've enabled hidden files and operating system files and there is nothing on the volume other than a folder and then a .vbm and vbk of 5gb size...

Gostev
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Re: ReFS state post September 2018 Windows Updates

Post by Gostev » Jul 02, 2019 9:26 am

backupquestions wrote:
Jul 02, 2019 1:12 am
does ReFS take time to free up space that is deleted?
Yes, releasing disk space occupied by deleted files is a background process in ReFS.

backupquestions
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Re: ReFS state post September 2018 Windows Updates

Post by backupquestions » Jul 02, 2019 1:08 pm

It doesn't seem consistent though, and it still hasn't released the 300gb of ghost space. I copied a 4gb iso just now and then deleted it and it frees up the space within a few seconds. Yet the original 300gb is still there in use but 0 files to correlate with that.

Gostev
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Re: ReFS state post September 2018 Windows Updates

Post by Gostev » Jul 02, 2019 1:33 pm

You may want to troubleshoot this with Microsoft Support then. They should be able to parse the file system and explain what exactly is stored in those 300GB.

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Re: ReFS state post September 2018 Windows Updates

Post by backupquestions » Aug 03, 2019 8:54 pm

In the end it was just the overhead space needed upon formatting an refs volume. Lol.

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