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David Collier-Brown

2000-Jul-31 19:38 UTC

Samba 2.0.7 & Transfer speeds

infernix wrote:> Copying a 107MB mp3 file takes almost 4 minutes (238 seconds) 
> when I copy it with samba. [Using windows explorer under Windows 2000 --dave]
> With FTP, it takes 27 seconds.
> 238 divided by 27 = 8.5 times slower.
	Ho boy, that's bad.
> I have several machines available to do testing, but you'd have to let
me
> know how and what. I am a linux sysadmin so i know the drill, but i
wouldn't
> know what to look for regarding samba ;)
	Sure: try a copy from & from  a unix machine using 
	smbclient and ftp to the samba machine: the samba 
	transfers should be slow, the ftp fast. 

	If this is true we have a samba problem that is not
	specific to the client you use.

	If it is false, it's specific to Windows 2000
	and samba.

	I'm going to cc this to the samba@samba.org list,
	too, as someone there might recognize what we find...

--dave
-- 
David Collier-Brown,  | Always do right. This will gratify some people
185 Ellerslie Ave.,   | and astonish the rest.        -- Mark Twain
Willowdale, Ontario   | //www.oreilly.com/catalog/samba/author.html
Work: (905) 415-2849 Home: (416) 223-8968 Email: davecb@canada.sun.com

David Collier-Brown

2000-Aug-01 11:40 UTC

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Samba 2.0.7 & Transfer speeds

infernix wrote:> But what i dont understand is why i really have to do unix to unix, since
> the samba transfer in windows 98 is just about as fast as with ftp?
	Then you don't: that eliminates win2k from the
	possible culprits.  I'm doing piecewise elimination
	of whole catagories of things that can go wroneg...

	Ok, time to lok at samba logs, with timestamps.
	Set log level to 3, and try two copies, one from
	win2k and one from win98, otherwise exactly
	identical. and mail me the smbd logs.

--dave

-- 
David Collier-Brown,  | Always do right. This will gratify some people
185 Ellerslie Ave.,   | and astonish the rest.        -- Mark Twain
Willowdale, Ontario   | //www.oreilly.com/catalog/samba/author.html
Work: (905) 415-2849 Home: (416) 223-8968 Email: davecb@canada.sun.com

Steve Snyder

2000-Aug-02 04:00 UTC

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Samba 2.0.7 & Transfer speeds

>infernix wrote:
>> Copying a 107MB mp3 file takes almost 4 minutes (238 seconds) 
>> when I copy it with samba. 
>[Using windows explorer under Windows 2000 --dave]
>
>> With FTP, it takes 27 seconds.
>> 238 divided by 27 = 8.5 times slower.
>
>	Ho boy, that's bad.
Do you see a performance difference depending on the direction 
(to/from the Samba server) of the copy?  

I ask because I can *read* from my Samba server (all 2.0.x versions)
at FTP speed, but writes take 4 - 5 as long as an FTP PUT operation. 
This is with Linux, OS/2 and Win98 clients so the problem must lay 
with the server side, not a client config problem.

*** Steve Snyder ***

David Collier-Brown

2000-Aug-02 15:17 UTC

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Samba 2.0.7 & Transfer speeds

Good news and bad news: 
  I've got comparative logs for win2k vs NT 4.0, and win2k is 
doing things **very** differently and as much as 8.5 times slower.
  The bad news is that the cause of problem hasn't jumped out at me!

  Windows 2000 takes 4 minutes 29 seconds to read a file that NT 4.0
reads in 1 minute 10 seconds. 

  We've narrowed it down to Samba (ftp is fine) and eliminated
obvious hardware/networking problems, so I'm now sitting here
in filemerge (the Sun visual diff) with snippits of two smbd logs...  
which I'm about to inflict on you!
>From Win2k----------
[2000/08/01 18:23:11, 3] smbd/reply.c:reply_sesssetup_and_X(805)
 Domain=[INFERNIX]  NativeOS=[Windows 2000 2195] NativeLanMan=[Windows 
 2000 5.0]

		From NT 4.0
		-----------
		[2000/08/01 18:18:47, 3] smbd/reply.c: 		
		reply_sesssetup_and_X(805) Domain=[WORKGROUP] 
		NativeOS=[Windows 4.0] NativeLanMan=[Windows 4.0]

				My Notes
				--------
				The domains are different,
				which may interfere.  Infernix,
				they are really the same machine,
				aren't they?


[2000/08/01 18:23:11, 2] lib/access.c:check_access(258)
 Allowed connection from infernix.ggmc.nl (192.168.0.17)
		[2000/08/01 18:18:47, 2] lib/access.c:
		check_access(258)  Allowed connection from
		infernix2.ggmc.nl (192.168.0.21)
				infernix is the win2k 
				infernex2 is nt 4.0



[2000/08/01 18:23:39, 3] smbd/process.c:switch_message(448)
  switch message SMBntcreateX (pid 1511)
[2000/08/01 18:23:39, 3] lib/util.c:unix_clean_name(522)
  unix_clean_name [/Trance/ferry_corsten-live_at_trance_energy  
 
-30-04-2000-2db/ferry_corsten-live_at_trance_energy__30-04-2000_2db.mp3]

		[2000/08/01 18:19:08, 3] smbd/process.c:switch_message(448)
 		 switch message SMBreadbraw (pid 1435)

				Win2k is about to open (create?) the
				file, at 28 seconds into the log, NT 4 just 
				opened it, 21 seconds into the log.


At this point, win2k goes into a loop doing oplocks 4 times:
--
[2000/08/01 18:23:39, 3] smbd/oplock.c:initial_break_processing(702)
  initial_break_processing: called for dev = 900, inode = 338018
tv_sec = 3986f98b, tv_usec = 639c5.
  Current oplocks_open (exclusive = 1, levelII = 0)
[2000/08/01 18:23:39, 3] lib/doscalls.c:dos_ChDir(342)
  dos_ChDir to /var/log
[2000/08/01 18:23:39, 3] smbd/oplock.c:initial_break_processing(702)
  initial_break_processing: called for dev = 900, inode = 338018
tv_sec = 3986f98b, tv_usec = 639c5.
  Current oplocks_open (exclusive = 1, levelII = 0)
[2000/08/01 18:23:39, 3] smbd/process.c:process_smb(618)
  Transaction 244 of length 45
[2000/08/01 18:23:39, 3] smbd/process.c:switch_message(448)
  switch message SMBclose (pid 1511)
---

After the 4 tries, it starts reading at 18:23:41, one second later
--
[2000/08/01 18:23:41, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
[2000/08/01 18:23:41, 3] smbd/reply.c:reply_read_and_X(2322)
  readX fnum=4401 min=61440 max=61440 nread=61440
[2000/08/01 18:23:41, 3] smbd/process.c:process_smb(618)
  Transaction 255 of length 63
[2000/08/01 18:23:41, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
---

It transfers in a pattern I don't happen to grok:
---
 [2000/08/01 18:23:41, 3] smbd/process.c:process_smb(618)
  Transaction 257 of length 63
[2000/08/01 18:23:41, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
[2000/08/01 18:23:41, 3] smbd/reply.c:reply_read_and_X(2322)
  readX fnum=4401 min=61440 max=61440 nread=61440
[2000/08/01 18:23:41, 3] smbd/process.c:process_smb(618)
  Transaction 258 of length 63
[2000/08/01 18:23:41, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
[2000/08/01 18:23:41, 3] smbd/reply.c:reply_read_and_X(2322)
  readX fnum=4401 min=16384 max=16384 nread=16384
[2000/08/01 18:23:42, 3] smbd/process.c:process_smb(618)
  Transaction 259 of length 63
[2000/08/01 18:23:42, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
[2000/08/01 18:23:42, 3] smbd/reply.c:reply_read_and_X(2322)
  readX fnum=4401 min=45056 max=45056 nread=45056
[2000/08/01 18:23:42, 3] smbd/process.c:process_smb(618)
  Transaction 260 of length 63
[2000/08/01 18:23:42, 3] smbd/process.c:switch_message(448)
  switch message SMBreadX (pid 1511)
[2000/08/01 18:23:42, 3] smbd/reply.c:reply_read_and_X(2322)
  readX fnum=4401 min=61440 max=61440 nread=61440
--
Anyone know if this indicates a problem?
It **looks** like its restarting, but there isn't enough
info to tell me...

		
NT 4.0 is similar, but the start value keeps increasing,
which isn't a threatening (;-))
--
[2000/08/01 18:19:08, 3] smbd/reply.c:reply_readbraw(2112)
  readbraw fnum=4730 start=917504 max=65520 min=0 nread=65520
[2000/08/01 18:19:08, 3] smbd/process.c:process_smb(618)
  Transaction 154 of length 49
[2000/08/01 18:19:08, 3] smbd/process.c:switch_message(448)
  switch message SMBread (pid 1435)
[2000/08/01 18:19:08, 3] smbd/reply.c:reply_read(2258)
  read fnum=4730 num=16 nread=16
[2000/08/01 18:19:08, 3] smbd/process.c:process_smb(618)
  Transaction 155 of length 55
[2000/08/01 18:19:08, 3] smbd/process.c:switch_message(448)
  switch message SMBreadbraw (pid 1435)
[2000/08/01 18:19:08, 3] smbd/reply.c:reply_readbraw(2112)
  readbraw fnum=4730 start=983040 max=65520 min=0 nread=65520
---


Windows 2000 finishes up at 18:27:47, while NT does many
more pages of read-raws, but ends at 18:19:55
---
[2000/08/01 18:27:40, 2] smbd/server.c:exit_server(408)
  Closing connections
[2000/08/01 18:27:40, 1] smbd/service.c:close_cnum(583)
  infernix (192.168.0.17) closed connection to service mp3

		[2000/08/01 , 2] smbd/server.c:exit_server(408)
		Closing connections
		[2000/08/01 18:19:55, 1] smbd/service.c:close_cnum(583)
		infernix (192.168.0.21) closed connection to service mp3

				win2k has taken 4 minutes 1 second,
				NT 4.0 only 47 seconds to get here.

---
Conclusion: win2k is slow, but I don't yet know why. Anyone here
able to comment?

--dave

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