search for: synchronization

Hi, I am fairly new to DTrace, and wanted to ask something regarding synchronization objects. I have a multithreaded C++ program in which I use semaphores (POSIX version) for synchronization. I was interested in using DTrace to figure out the total time for which each thread in my application sleeps, blocked on a semaphore, i.e., as a result of sem_wait() call. In order to meas...

Hi, I have set a Samba AD DC on my network. Version is 4.1.17 on a Debian Wheezy. I have an issue on my Windows XP SP3 clients : the time on these computers is not synchronized with my Domain Controler. Big problem is, if time difference is considerable (more or less 5 minutes), users can not log in. On the other hand, my server is correctly synchronized with NTP server. I don't

...gating. > > > Has anybody got this issue ? > > Got exactly your problem two days ago. > From elevated shell: > > w32tm /unregister > reboot > w32tm /register > w32tm /config /manualpeerlist:time.example.com /syncfromflags:MANUAL > /update > time /T (To test if synchronization done correctly) > > time.example.com is your domain time server - either AD DC or an NTP > server it > is synchronized with. I prefer NTP, though. Domain time service seems to be > unreliable in my setup, or needs to be enabled manually. > > > -- > With best regards, >...

Hello to all I'm using asterisk 1.4 and dahdi. I had everything working fine, and I could place calls through my R2 channel. But now the channel is always "RED" and Im getting this error message: TE4XXP: Version Synchronization Error! Here is my chan_dahdi.conf------------------------------ [channels] language=en context=incomingr2 signalling=mfcr2 mfcr2_variant=ar switchtype=national mfcr2_get_ani_first=no mfcr2_max_ani=20 mfcr2_max_dnis=9 mfcr2_category=national_subscriber channel =>1-15,17-30 here is my d...

...ch works juste fine. This tools queries an LDAP directory, extracts relevant informations and sync them with google apps. It would also synchronize passwords if there were in the LDAP directory. Actually, if I manually set a "userPassword" attribute for a user, using MD5 hash for example, synchronization works just fine and the google apps account gets updated. Alas, if I get it right, Samba 4 acting as a AD DC uses it's own internal LDAP server and also a default Heimdal implementation of Kerberos, also included in Samba. Thus, the password (or it's hash) doesn't get stored in the LDA...

...synchronize_rcu() which makes it unsuitable to be called in MMU > > > notifier. > > > > > > A solution is SRCU but its overhead is obvious with the expensive full > > > memory barrier. Another choice is to use seqlock, but it doesn't > > > provide a synchronization method between readers and writers. The last > > > choice is to use vq mutex, but it need to deal with the worst case > > > that MMU notifier must be blocked and wait for the finish of swap in. > > > > > > So this patch switches use a counter to track whether or...

...synchronize_rcu() which makes it unsuitable to be called in MMU > > > notifier. > > > > > > A solution is SRCU but its overhead is obvious with the expensive full > > > memory barrier. Another choice is to use seqlock, but it doesn't > > > provide a synchronization method between readers and writers. The last > > > choice is to use vq mutex, but it need to deal with the worst case > > > that MMU notifier must be blocked and wait for the finish of swap in. > > > > > > So this patch switches use a counter to track whether or...

...h sub-optimal in most cases (see caveats below). I would like to propose new options to efficiently synchronize these files. To make this report as clear as possible, I kindly remind that modification times (mtime) can be manually set by users (e.g. with touch) and rsync will preserve those during synchronization (with -a, which includes -t). By contrast, change times (ctime) are automatically updated by the OS when files are changed. rsync relies on modification times to decide whether it should skip or transfer files. There are some use cases where files are modified while preserving their original sizes...

Hi, I am seeing constant "Log synchronization error"s in my logs. See later for an example. This is dovecot 2.2.4, pigeonhole 0.4.1, and postfix 2.10.1 (with mailbox_command = /usr/libexec/dovecot/deliver) on a Fedora 19 system. I am using packages from Atrpms so there are some patches applied - ask for details. The mailboxes have re...

Hi folks I face a problem about the data synchronization when using the ctdb. When one ctdb node fails, other ctdb nodes may not recover the data of the failed node. I think it may be due to the fact that ctdb stores its tdb files in the local storage. So, is it fine to store the tdb files in the shared directory of the backend storage? When one node fai...

As mentioned in below link:- https://wiki.samba.org/index.php/Setting_up_Samba_as_an_Active_Directory_Domain_Controller I am trying to synchronize time for Kerberos with NTP. But NTP(4.2.6) supported on hpux is not build with enabled signed ntp support *(**--enable-ntp-signd)* for time synchronization mechanism. What would be the impact if i don’t configuring time synchronization for Samba AD DC ? Arjit Kumar

...brary/cc773013(v=ws.10).aspx Greetz, Louis >-----Oorspronkelijk bericht----- >Van: william.epci at gmail.com >[mailto:samba-bounces at lists.samba.org] Namens William LIM >Verzonden: woensdag 22 april 2015 14:57 >Aan: samba at lists.samba.org >Onderwerp: Re: [Samba] Time synchronization issue > >Hello Andrey > >Thanks for the trick. I'll try it. > >But it's a pity it doesn't work natively, right ? > >2015-04-22 14:08 GMT+02:00 Andrey Repin <anrdaemon at yandex.ru>: > >> Greetings, William LIM! >> >> > Hi, >> &...

On Fri, Sep 26, 2014 at 01:00:05PM +0300, Lauri Peltonen wrote: > > Hi guys, > > > I'd like to start a new thread about explicit fence synchronization. This time > with a Nouveau twist. :-) > > First, let me define what I understand by implicit/explicit sync: > > Implicit synchronization > * Fences are attached to buffers > * Kernel manages fences automatically based on buffer read/write access > > Explicit synchron...

...called in MMU >>>>>> notifier. >>>>>> >>>>>> A solution is SRCU but its overhead is obvious with the expensive full >>>>>> memory barrier. Another choice is to use seqlock, but it doesn't >>>>>> provide a synchronization method between readers and writers. The last >>>>>> choice is to use vq mutex, but it need to deal with the worst case >>>>>> that MMU notifier must be blocked and wait for the finish of swap in. >>>>>> >>>>>> So this patch swi...

2 questions regarding the synchronization of these events. 1) is onSuccess called before onComplete ( I assume it is) 2) if called after, is onComplete called after the onSuccess method has completed or are you at the mercy of synchronization issues? Hopefully someone can enlighten me. I tried reading the Prototype.j...

...ze_rcu() which makes it unsuitable to be called in MMU >>>> notifier. >>>> >>>> A solution is SRCU but its overhead is obvious with the expensive full >>>> memory barrier. Another choice is to use seqlock, but it doesn't >>>> provide a synchronization method between readers and writers. The last >>>> choice is to use vq mutex, but it need to deal with the worst case >>>> that MMU notifier must be blocked and wait for the finish of swap in. >>>> >>>> So this patch switches use a counter to track whe...

... does not work. I use the W2k functionality "synchronize" on my laptop to have up2date synchronized copies of my files both at the laptop and the file server. The file server is a P 200 MHz running RH Linux 9. When on-line the synchronization of files works, except for my swedish letters "???". However when off-line working with my files, then reconnecting to the network and issuing a synchronization it fails. The updating of the files on the server fails. Am I doing something wrong here or is the SMB protocol used by samb...

...which is relevant to the opened file: 1) brlock.tdb 2) locking.tdb 3) smbXsrv_open_global.tdb These three tdb files are used to realize the durable file handle feature. As what you have said, the performance will be affected if storing these three files in the shared storage. So can I realize the synchronization with the solutions below: 1) set these three tdb files as persistent tdb files to realize synchronization (Is this way even worse than storing in the shared storage when concerning the performance affecting?) 2) Real-time backing up the modification of the normal tdb to other ctdb nodes(just a simp...

...uses the map. This means, when it was even, we're sure there's no > readers and MMU notifier is synchronized. When it was odd, it means > there's a reader we need to wait it to be even again then we are > synchronized. Consider the read critical section is pretty small the > synchronization should be done very fast. > > Reported-by: Michael S. Tsirkin <mst at redhat.com> > Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual address") > Signed-off-by: Jason Wang <jasowang at redhat.com> > drivers/vhost/vhost.c | 141 ++++++++++++...

...uses the map. This means, when it was even, we're sure there's no > readers and MMU notifier is synchronized. When it was odd, it means > there's a reader we need to wait it to be even again then we are > synchronized. Consider the read critical section is pretty small the > synchronization should be done very fast. > > Reported-by: Michael S. Tsirkin <mst at redhat.com> > Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual address") > Signed-off-by: Jason Wang <jasowang at redhat.com> > drivers/vhost/vhost.c | 141 ++++++++++++...