Questions tagged [locking]
46 questions
18
votes
4 answers
File locks on an NFS?
My server uses NFS (Network File System), and I'm unable to use PHP's flock() -function. Is there a way to lock files on an NFS or is there a need to do so?
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rFactor
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9
votes
6 answers
How do you know who or what is locking a remote file?
I can tell what process is holding a lock using Unlocker.
But the problem is that, when there is a lock on a file on a remote machine, Unlocker doesn't show who or what process is locking.
Is there anyway what is holding a lock on a remote file (my…
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dance2die
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8
votes
2 answers
Avoid /usr/bin/xauth: error in locking authority file /home/user/.Xauthority
In batch scripts I often log in to the same system through ssh multiple times. E.g.
seq 1000 | parallel -j0 -S server echo
This triggers a race condition giving the error:
/usr/bin/xauth: error in locking authority file /home/user/.Xauthority
How…
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Ole Tange
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6
votes
3 answers
How do you know who or what is locking a removable disk?
I was reading that question How do you know who or what is locking a remote file? and I remember that question... even in Windows7, the Windows doesn't show that program is locking the removable disk, so we cannot safely remove the hardware. There…
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Click Ok
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5
votes
1 answer
How can I test whether fcntl() locks work with my NFS setup?
From the SQLite FAQ:
Can multiple applications or multiple instances of the same application access a single database file at the same time?
…
SQLite uses reader/writer locks to control access to the database. … But use caution: this locking…
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200_success
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5
votes
2 answers
MS Sql Server getting overloading with 'Suspended' queries, mostly reads. Any way to fix this?
I have a Microsoft Sql Server that handles a moderate amout of traffic for a company software suite made up of multiple clients in java and c#.
It is getting overloaded with 'Suspended' queries. They eventually go through, but some are timing out…
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AAA
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4
votes
2 answers
How to detect exceptionally long file locks in linux?
I have a point of contention on my linux server. One of a number of processes access a single file and lock the file at a random time for a considerable period (>60 seconds) which, in turn, causes other things to fail.
Is there a way to detect how…
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tudor -Reinstate Monica-
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4
votes
1 answer
Executing multiple commands with setlock
In a bash script I would like to execute multiple commands while keeping a file locked with setlock. Setlock however only supports the following usage:
setlock [-NnXx] [lock file] [command]
Is there a way to wrap multiple commands together besides…
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John
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3
votes
1 answer
Files locked for on user on Windows Server 2016
I am running a file server on Windows Server 2016 with ~15 users. One user has a lot of difficulty accessing files on the shared drive. The following occurs:
Many (sometimes all) files are locked and the user gets a popup that "Another user" is…
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Cliff
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3
votes
1 answer
ZFS over NFS concurrent write issues
I run a Proxmox cluster, and on this cluster, I have a few VMs on a private network, with a (Proxmox-managed) CEPH storage backend for the VM disks.
One (KVM) VM running "Ubuntu 16.04 server minimal vm" is configured with a second "hard disk", set…
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Eddy Buhler
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3
votes
0 answers
Linux NFS server refuses blocking locks
So I have this problem. This horrible, awful problem.
I have a set of Linux NFS servers (in a NFS/CIFS cluster using CTDB) that refuse locks… only when the lock is blocking. If it's a non-blocking call, it works just fine.
See the traffic flow…
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MikeyB
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3
votes
2 answers
Shared block device file system (cluster file system without networking)
Is there any file system that can be mounted multiple times and supports concurrent file access for Linux? Basically I want something like a cluster file system but without the need to have a running network for a distributed lock manager. That can…
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fungs
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2
votes
0 answers
(How) should I lock a Maildir mailbox managed by Dovecot before creating a backup via rsync?
I maintain an IMAP server running Dovecot which uses Maildir as the storage format for the user mailboxes. Every night, an rsync process runs to create a backup of the mailboxes. Recently, I noticed that rsync occasionally prints messages like
file…
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Frerich Raabe
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2
votes
0 answers
how to determine which process/thread holds the flock
When one or more processes/threads do an flock, how to determine who is currently holding the lock. 'fuser' on the file shows all the threads holding and waiting for the lock, not just the one who is the current lock holder.
related thread :…
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Swami Jayaram
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2
votes
1 answer
Windows Server 08 R2 file share File locking, OSX clients
I've spent the last two weeks banging my head against this wall. I think I'm starting to understand the problem though. I manage a design company and they have 5 macs (OSX 10.5/.6/.7) connected over SMB to a Windows 2008 R2 file server, another…
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Keith Loughnane
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