Re: Multiple backends with NFSv4.1 (supports file locking): should work without Director, right?

2023-05-20 Thread Noel Butler
On 20/05/2023 01:23, Adrian Minta wrote: Hi Pierre, when we tested NFSv4 couple of years ago, we found out that NFSv4 has a caching feature witch delegate file caching to a specific client. This was a problem with same share mounted on multiple servers. The contention will explode the load

Re: fts crash

2023-05-20 Thread Shawn Heisey
On 5/20/23 00:13, Przemysław Kwiatkowski via dovecot wrote: I started full reindex of whole emails base (doveadm index -A '*') and solr crashed due to out of memory. I had plenty of such messages: If you are seeing Java's "OutOfMemoryError" exception, you must figure out what resource was depl

Re: Multiple backends with NFSv4.1 (supports file locking): should work without Director, right?

2023-05-20 Thread D D
Thanks Tom. Are you refering to a proxy software in particular (e.g. Dovecot proxy, Nginx, ...)? Do you mean having a single proxy in front of all the backends? We'd prefer to avoid that if possible, as that makes the proxy a single point of failure. But it seems to be the recommended way to de

Re: Multiple backends with NFSv4.1 (supports file locking): should work without Director, right?

2023-05-20 Thread D D
Thanks for the input! Great to know that you got clusters working with at least some version of NFS without using Director. Were you guys using NLM (Network Lock Manager), dotlock, or something else, to have file locking capabilities with NFSv3? The delegation feature of NFSv4 mentioned by Adri