[Samba] vfs_fruit causes delay in listing directories for Windows clients

[L.P.H. van Belle]

Hai, 

Can you tell the following that helps. 

OS ?   
Samba Version?  ( pre-builded or source ) 
Kernel version? 

I think you need to wait for 4.9.4 if all patches ive seen on vfs_fruit are getting in. 
These might help. Go through bugzilla, you might find more about this here. 


Greetz, 

Louis

 

> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Stephan Roth via samba
> Verzonden: woensdag 12 december 2018 15:35
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] vfs_fruit causes delay in listing 
> directories for Windows clients
> 
> Listing directories with many files (10000+) from a Windows client is 
> nociceably slower when vfs_fruit is enabled on the samba 
> server compared 
> to the same setup without vfs_fruit.
> 
> On my setup it's roughly 2.5 times slower. To me it looks 
> like this is 
> caused by the getxattr call which is only present with vfs_fruit 
> activated and introduces an additional delay of ~ 0.00033 s 
> per listed file.
> 
> strace -T reveals the following with vfs_fruit activated:
> 
> newfstatat(35, "03915", {st_mode=S_IFREG|0660, st_size=1265, ...}, 
> AT_SYMLINK_NOFOLLOW) = 0 <0.000243>
> fcntl(20, F_SETLKW, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=8368, 
> l_len=1}) = 0 <0.000010>
> fcntl(20, F_SETLKW, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=8368, 
> l_len=1}) = 0 <0.000009>
> stat("stroth/testfiles_10000-50000/10000/03915", 
> {st_mode=S_IFREG|0660, 
> st_size=1265, ...}) = 0 <0.000312>
> getxattr("stroth/testfiles_10000-50000/10000/03915", 
> "user.org.netatalk.Metadata", 0x55803d5c9a90, 402) = -1 
> ENODATA (No data 
> available) <0.000348>
> listxattr("testfiles_10000-50000/10000/03915", "", 1024) = 0 
> <0.000345>
> 
> a trace of the same directory listing with vfs_fruit disabled 
> is faster 
> and doesn't show the getxattr call:
> 
> newfstatat(36, "03239", {st_mode=S_IFREG|0660, st_size=303, ...}, 
> AT_SYMLINK_NOFOLLOW) = 0 <0.000252>
> fcntl(20, F_SETLKW, {l_type=F_RDLCK, l_whence=SEEK_SET, 
> l_start=19600, 
> l_len=1}) = 0 <0.000008>
> fcntl(20, F_SETLKW, {l_type=F_UNLCK, l_whence=SEEK_SET, 
> l_start=19600, 
> l_len=1}) = 0 <0.000007>
> stat("stroth/testfiles_10000-50000/10000/03239", 
> {st_mode=S_IFREG|0660, 
> st_size=303, ...}) = 0 <0.000419>
> listxattr("testfiles_10000-50000/10000/03239", "", 1024) = 0 
> <0.000355>
> 
> 
> My goal with activating vfs_fruit was to speed up directory 
> listings for 
> Mac clients, which works. Can the accompanying slowdown for Windows 
> clients be avoided?
> 
> Thank you for any insights,
> Stephan
> 
> 
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