search for: lstat

I am chasing a problem with dovecot generating an error: lstat(/var/spool/virtual_mailboxes/[domain dir]/[user dir]/Maildir/cur) failed: Permission denied I first tried making the directory world readable, same error. Them tried to lstat [the path] at the console and receive the error: lstat: command not found I have a manpage on lstat, but no file. "...

...ad(0, "\36\0\0\0", 4) = 4 select(2, NULL, [1], [1], {60, 0}) = 1 (out [1], left {60, 0}) write(1, "G\221\247G", 4) = 4 select(1, [0], [], NULL, {60, 0}) = 1 (in [0], left {59, 140000}) read(0, "\0\0\0\0", 4) = 4 lstat("/reference/Quality/Issue14", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0 chdir("/reference/Quality") = 0 mmap(NULL, 266240, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaadfe1000 mmap(NULL, 266240, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS...

...a few miscues. Actually the OS is Redsleeve6, which is the arm port of Centos 6, and perhaps some of my problems may come down to porting problems. But first, it may be that despite my testing, I missed something in the configurations. First clamd problems: Nov 19 08:09:54 z9m9z clamd[857]: lstat() failed on: /var/spool/amavisd/tmp/amavis-20141119T075446-18598/parts Nov 19 08:10:15 z9m9z clamd[857]: lstat() failed on: /var/spool/amavisd/tmp/amavis-20141119T075446-18599/parts Nov 19 08:11:13 z9m9z clamd[857]: lstat() failed on: /var/spool/amavisd/tmp/amavis-20141119T075446-18598/parts Nov...

...; --- src/ph_rpm.ml | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/ph_rpm.ml b/src/ph_rpm.ml index dbe3bda..0821126 100644 --- a/src/ph_rpm.ml +++ b/src/ph_rpm.ml @@ -234,7 +234,10 @@ let rpm_package_name pkg = rpm.name let rpm_get_package_database_mtime () = - (lstat "/var/lib/rpm/Packages").st_mtime + try + (lstat "/var/lib/rpm/rpmdb.sqlite").st_mtime + with Unix_error (ENOENT, _, _) -> + (lstat "/var/lib/rpm/Packages").st_mtime (* Return the best provider of a particular RPM requirement. * -- 2.26.2

...:42 pm, Niklas Hamb?chen <mail at nh2.me> wrote: > > Hi, > > I have a gluster 3.10 volume with a dir with ~1 million small files in > them, say mounted at /mnt/dir with FUSE, and I'm observing something weird: > > When I list and stat them all using rsync, then the lstat() calls that > rsync does are incredibly fast (23 microseconds per call on average, > definitely faster than a network roundtrip between my 3-machine bricks > connected via Ethernet). > But when I try to back them up with the `bup` tool > (https://github.com/bup/bup), which (at least...

...s on ocfs2 filesystem with both UEK 2.6.39-100.0.18 and RHEL 2.6.18-300.el5: hugemmap02 1 TCONF : huge mmap failed to test the scenario hugemmap02 1 TCONF : huge mmap failed to test the scenario hugemmap02 0 TWARN : tst_rmdir: rmobj(/mnt/ocfs2/ltp-mQdlAx5411/hugSJXB0B) failed: lstat(/mnt/ocfs2/ltp-mQdlAx5411/hugSJXB0B) failed; errno=2: No such file or directory hugemmap02 1 TCONF : huge mmap failed to test the scenario hugemmap02 0 TWARN : tst_rmdir: rmobj(/mnt/ocfs2/ltp-mQdlAx5411/hugSJXB0B) failed: lstat(/mnt/ocfs2/ltp-mQdlAx5411/hugSJXB0B) failed; errno=2: No...

Hi Ben, do you know if the smallfile benchmark also does interleaved getdents() and lstat, which is what I found as being the key difference that creates the performance gap (further down this thread)? Also, wouldn't `--threads 8` change the performance numbers by factor 8 versus the plain `ls` and `rsync` that I did? Would you mind running those commands directly/plainly on your...

...g a very long time, specifically with small files (write throughput is fine). I know, I know -- small files on gluster do not perform well, but I'm seeing particularly terrible performance in the range of around 25 to 50 creates per second. Profiling and testing indicate the main bottleneck is lstat calls on glusterfs metadata. Running an strace against the glusterd PIDs during a migration shows a lot of lstat calls taking a relatively long time to complete: strace -Tfp 3544 -p 3550 -p 3536 2>&1 >/dev/null | awk '{gsub(/[<>]/,"",$NF)}$NF+.0>0.5' | grep -Ev...

...diff --git a/src/ph_rpm.ml b/src/ph_rpm.ml > > index dbe3bda..0821126 100644 > > --- a/src/ph_rpm.ml > > +++ b/src/ph_rpm.ml > > @@ -234,7 +234,10 @@ let rpm_package_name pkg = > > rpm.name > > > > let rpm_get_package_database_mtime () = > > - (lstat "/var/lib/rpm/Packages").st_mtime > > + try > > + (lstat "/var/lib/rpm/rpmdb.sqlite").st_mtime > > + with Unix_error (ENOENT, _, _) -> > > + (lstat "/var/lib/rpm/Packages").st_mtime > > > > (* Return the best provider o...

On 11/08/2013 09:12 AM, Steve Capper wrote: > diff --git a/usr/klibc/lstat.c b/usr/klibc/lstat.c > new file mode 100644 > index 0000000..0282eec > --- /dev/null > +++ b/usr/klibc/lstat.c > @@ -0,0 +1,17 @@ > +#include <fcntl.h> > +#include <unistd.h> > +#include <sys/types.h> > +#include <sys/stat.h> > +#include <sy...

Hi, I have a gluster 3.10 volume with a dir with ~1 million small files in them, say mounted at /mnt/dir with FUSE, and I'm observing something weird: When I list and stat them all using rsync, then the lstat() calls that rsync does are incredibly fast (23 microseconds per call on average, definitely faster than a network roundtrip between my 3-machine bricks connected via Ethernet). But when I try to back them up with the `bup` tool (https://github.com/bup/bup), which (at least according to strace) doe...

...en having trouble when making R from source and with "R CMD build dse" forcing the machine to look for an NFS server which was not available, and then stalling. Our system administrator traced this back to the fact that these go through all the directories back to "/" , doing an lstat on everything. He suggests that that seems odd, but it doesn't take long normally. The problem was apparently caused by the fact that something (possible a cdrom) on /mnt had not been unmounted properly. We have fixed the problem but since it was rather difficult to track down I thought I wo...

On 17/09/17 18:03, Niklas Hamb?chen wrote: > So far the only difference between `ls` and `bup index` I could observe > is that `bup index` chdir()s into the directory to index, ls doesn't. > > But when I `cd` into the dir and run `ls` without directory argument, it > is still much faster than bup index for each stat(). Hmm, bup uses the fchdir() syscall to go into the target

----- Original Message ----- > From: "Niklas Hamb?chen" <mail at nh2.me> > To: "Ben Turner" <bturner at redhat.com> > Cc: gluster-users at gluster.org > Sent: Sunday, September 17, 2017 9:49:10 PM > Subject: Re: [Gluster-users] Confusing lstat() performance > > Hi Ben, > > do you know if the smallfile benchmark also does interleaved getdents() > and lstat, which is what I found as being the key difference that > creates the performance gap (further down this thread)? I am not sure, you can have a look at it: https:/...

I found the reason now, at least for this set of lstat()s I was looking at. bup first does all getdents(), obtaining all file names in the directory, and then stat()s them. Apparently this destroys some of gluster's caching, making stat()s ~100x slower. What caching could this be, and how could I convince gluster to serve these stat()s as fast a...

Hi all, I am on gluster 3.10.5 with one EC volume 16+4. One of the machines go down previous night and I just fixed it and powered on. When glusterfsd processes started they consume all CPU on the server. strace shows every process goes over in bricks directory and do a lstat & readlink calls. Each brick directory is 8TB, %60 full. I waited for 24 hours for it to finish but it did not. I stopped glusterd and restarted it but same thing happens again. Why on startup glusterfsd processes traverse brick directory? Is it related to self heal? This happened one time bef...

On 11/08/2013 09:12 AM, Steve Capper wrote: > -<!ppc64> int stat64,stat::stat(const char *, struct stat *); > -<!ppc64> int lstat64,lstat::lstat(const char *, struct stat *); > +<!arm64,ppc64> int stat64,stat::stat(const char *, struct stat *); > +<!arm64,ppc64> int lstat64,lstat::lstat(const char *, struct stat *); This should have been part of the previous patch but using <?!ppc64>. -hpa

...------------- ## ## Target attribute `outcome' ## ## Read 506 cases (14 attributes) from undefined.data ## ## Model: ## ## Rule 1: [101 cases, mean 13.84, range 5 to 27.5, est err 1.98] ## ## if ## nox > 0.668 ## then ## outcome = -1.11 + 2.93 dis + 21.4 nox - 0.33 lstat + 0.008 b ## - 0.13 ptratio - 0.02 crim - 0.003 age + 0.1 rm ## ## Rule 2: [203 cases, mean 19.42, range 7 to 31, est err 2.10] ## ## if ## nox <= 0.668 ## lstat > 9.59 ## then ## outcome = 23.57 + 3.1 rm - 0.81 dis - 0.71 ptratio - 0.048 age ##...

...------------- ## ## Target attribute `outcome' ## ## Read 506 cases (14 attributes) from undefined.data ## ## Model: ## ## Rule 1: [101 cases, mean 13.84, range 5 to 27.5, est err 1.98] ## ## if ## nox > 0.668 ## then ## outcome = -1.11 + 2.93 dis + 21.4 nox - 0.33 lstat + 0.008 b ## - 0.13 ptratio - 0.02 crim - 0.003 age + 0.1 rm ## ## Rule 2: [203 cases, mean 19.42, range 7 to 31, est err 2.10] ## ## if ## nox <= 0.668 ## lstat > 9.59 ## then ## outcome = 23.57 + 3.1 rm - 0.81 dis - 0.71 ptratio - 0.048 age ##...

hello The homedirectories are stored as a relative path in my userdb One problem ocoures with rawlog: rawloging occures only if a directory $HOME/dovecot.rawlog exist. this is checked with lstat for me $HOME is always "username/". This is relative to /var/mail and works. in rawlog.c lstat should now check "username//dovecot.rawlog" which fails. lstat can check "/var/mail/username//dovecot.rawlog" or "./dovecot.rawlog" ( All checks test the existenc...