Slow File Sharing

I have a little wireless network with 4 PowerBook Pro. My problem:
Connecting, upload/download to the internet is very fast (as fast as possible by my provider...). But: FileSharing is very, very slow: Connecting to any other computer lasts for a long time (2 minutes), sharing a file with 47MB lasts for about 15 Minutes. The problem exists on all/to all the Macs in my network.
There must be a problem with afp....who can help?
Which other Info do you need for solving this problem?

There were no answers, so I tryed by myself:
In Systempreferences > Network > Airport > Options > DNS I have insert the two DNS-Numbers of my provider. (There was only the number of the router which is 192.168.1.1 in grey).
Now the data-Transfer between the Macbooks works fine.
+I wait with closing my question until I know what happens when I use my MacBook in the office (there i didn't have the problem until this moment.+

Similar Messages

Slow files sharing, Slow files sharing

Hi there
I have many problems sharing files in the Internet
When I am connected in the same router with my mini Mac lion server and my air Mac, they share the files very good, but when I am outside from another net, it connects but very slow.
Is any extra configuration I need to perform?
Also I can't connect my WebDAV folder in my iPad with the server
What I need to config so it connects?
Thanks
Andres

OS X has two (2) protocols that are primarily used for sharing files.
1. Server Message Block, or SMB. This is primarily for sharing with Windows users.
2. Apple File Protocol, or AFP. This is primarily for sharing with OS X users.
Some ISPs will block SMB traffic. AFP traffic is not usually blocked, however for large files over the Internet it can be problematic. FTP is more efficient in those situations.
Having said that, I do not think your file sharing protocol is the problem. I think it is your server's upload speed. If the Internet at your server has an upload (to the Internet) speed of 0.4Mbps, that would appear as about 45KB/s in Finder windows when transferring files. That is slow. The limiting factor when accessing files on the server is the server's upload speed.
If the Internet connection at your outside location has an upload (to the Internet) speed of 1Mbps, then the limiting factor to sending files back to the server is your upload speed. Upload speeds are usually the limiting factor, however your upload speeds are so low that you cannot expect good performance. I would say you need upload speeds of at least 5Mbps.
Also try pinging your remote server, provided there is no firewall blocking pings. If you see high latency in the ping times, or if pings are being dropped, that would affect performance as well.

File sharing too slow

Hi,
I have 2 macs connected via hub. My internet connection is very fast and everything is ok but file sharing is too slow. 1GB takes 8 hours to be transfered.
Any fix?
Thanks!

yup same here, 9 gb file shared via airport extreme from my Macpro 8proc to my 17" Macbook Pro was going to take 4 hrs?????? doing it via firewire now, 10 minutes.
is there a network setting in missing as both machines obviously have 902.11N and the extreme is setup for N (B/G compatible)??
jas

Why is iTunes slow to transfer files to File Sharing

The latest releases of Apple iTunes on Windows 11.1.4.62 and iTunes on Mac 11.1.4 (62) 64-bit is taking a few minutes per (200kb) file to transfer data via File Sharing into an application. This is a significant and very noticeable change in performance over the previous release -- certainly used be near instantaneous transfer. File deletion is also extremely slow. This is common across all Apps that support File Sharing including Adobe Reader, Quick Office, Google Earth, etc.
I'm using iPad2 (MC979B/A), iOS7.0.4(11B554a).
Is this is a bug?
Thanks in advance for any information.
Nick

Hey there jbrensinger,
It sounds like the attachment window in the Mail app is taking longer than normal to load. I recommend first performing a Safe Boot, then re testing the issue:
OS X: What is Safe Boot, Safe Mode?
http://support.apple.com/kb/HT1564?viewlocale=en_US
To start up into Safe Mode (to Safe Boot), follow these steps.
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key.
The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple logo and the progress indicator (looks like a spinning gear).
After the logo appears, you should see a progress bar during startup. This indicates that your computer is performing a directory check as part of Safe Mode.
To leave Safe Mode, restart your computer without holding any keys during startup.
If the issue persists, I would next reindex spotlight with the following article:
Spotlight: How to re-index folders or volumes
http://support.apple.com/kb/ht2409
Thank you for using Apple Support Communities.
Take care,
Sterling

Windows File Sharing - Slow only in one direction?

Hi everybody,
I'm having a really strange problem with my network. I'm copying files between my G4 Mac mini and Windows XP Home machine, both with all of the latest OS updates. The computers are connected via a 10/100 switch and both are connecting at 100baseTX, full duplex. I have Windows File Sharing running on the Mac mini and I am sharing my entire user directory on the Windows machine as well. So I'm doing all of the file sharing over SMB.
Almost everything works fine--there's just one issue: file copies from the Windows XP machine to the Mac are incredibly slow. Transfers in every other direction work fine. If I connect from the Mac to the Windows machine and copy a file to the Windows machine, or if I'm on the Mac and I download a file from the Windows machine, it's fast. It's also fast if I connect from the Windows machine to the Mac and copy a file from the Mac--a 16 MB file copies in 5 seconds or less. But if I'm on the Windows machine and I try to copy a file to the Mac, it goes VERY slowly--a 16 MB file copy is now measured in minutes instead of seconds.
I googled around and found some people adding a line to their smb.conf file to fix it, but I tried adding the line to no avail (and of course, restarted windows file sharing and killed smbd to make sure it re-read the config file). I also saw some people who fixed it by making sure the network cards on both machines were manually set to 100baseTX, full-duplex--tried that too, didn't make a difference (it's autodetecting properly in my case anyway).
Anyone seen this before? I'd appreciate any suggestions. Thanks! By the way, I just completely reformatted the Windows machine and did a complete reinstall of Windows XP(why do you think I prefer Macs? ) and it had this problem before as well, so as far as I know, the Windows machine doesn't have some crazy virus or something causing it.
Doug
Mac mini G4 1.42 GHz Mac OS X (10.4.6)

Thanks for the reply! I had been on that site but I had been getting there through Google, so I went ahead and did a search on the site and found an article about speeding up Samba:
http://www.macosxhints.com/article.php?story=20051107090652912
There was a discussion below the article with people who had problems similar to mine, so I tried a suggestion near the bottom, adding the line:
large readwrite = no
To the Mac's smb.conf file, and now everything is fast like it should be. Thanks for pointing me in the right direction! This problem has been plaguing me for months.
Mac mini G4 1.42 GHz Mac OS X (10.4.6)

Windows server 2012 standard - slow performance in file sharing

I recently installed two windows server 2012, one is for DC, one is for File Sharing; it works fine in the beginning.
Lately, it comes a problem, every once a while it is very slow when opening a file on the server from a client PC; but when i restart the file server then it will be fine again.

Hi Simon,
Based on your description, how is the workload of the file server?
Before going further, regarding slow network performance when opening a file that is located in a shared folder on a remote network computer, the following article can be
referred to as reference.
Slow network performance when you open a file that is located in a shared folder on a remote network computer
http://support.microsoft.com/kb/829700
Besides, the following thread may have focused on the similar issue and can be worth taking a look.
Slow network file execution on Windows Server 2012
http://social.technet.microsoft.com/Forums/en-US/bcb4b580-50ef-4f10-bc9b-16db1bf24804/slow-network-file-execution-on-windows-server-2012?forum=winserverfiles
Best regards,
Frank Shen

File Sharing Problem and slow data transfer

Hi,
i just receive my MBP a few weeks ago and i wanted to transfer some data with a friend who has a MacBook. I tried to share a folder and it cold not be seen by the MB as guest login. i checked the permission when i add the folder to the file sharing as read only. Second problem i had is more intriguing...finally a i decide to log in as Me with the MB, and then i saw my folder shared. he copy the stuff he need it with an acceptable speed. He shared a folder to me the same way i tried and it works!! but the more frustrating was to see how slow was the transfer from the MB to my MBP. Can find any explication...any suggestion???? please !!

slowness of wireless transfer speeds could have something to do with your access point/wireless router.... if you have bad bars on your airport card then try moving closer to the signal.
also what is that total size of the files you are trying to move to each laptop?
i remember when i transferred a fair amount of MP3's it did take a little bit of time....

Apple File Sharing very slow with Mountain Lion

I've noticed since upgrading to 10.8 the transfer speeds over a LAN via AFP (File Sharing) are VERY slow.. in some instances. Based on the behaviour i'm guessing it has something to do with the amount of items.
for instance:
A folder that contains approx 122mb worth of 1500 small files takes me about 50 seconds to transfer while a long audio recording with a greater filesize of 125mb takes only 11 seconds.
using SCP from the command line the same 122mb folder took only 19 seconds while the audio took 10 seconds.
after performing the same operations on a computer running 10.6 I can deduce that the problem is on the receiving end. Audio file transfer times were the same, however the same folder of items took only 27 seconds when it was transferred to a computer running 10.6 regardless of which OS the computer sending the file was running.
apparently handling a greater number of files increases transfer time for both methods but AFP is painfully slow with 10.8 on the receiving end.
any thoughts or suggestions?
I've read a couple threads about people having trouble with Time Machine running slowly.. i wonder if this is related.

Same problem here. I just upgraded from Lion to Mountain Lion. I only got 19 GB of space, but Time Machine wants 10 hours, whereas in OSX Lion a full backup would take just under an hour, and incremental updates were lightning fast.
I even sat it up to do it overnight, but on 8 hours it was only half way through only 10 GB. I can't live with that in the future.
Im trying to backup on a SD card which seems to work very good in Lion. Im on a 2012 Macbook Air using a SSD.
My bite of the apple has been somewhat sour. I tried reformatting the SD card, well knowing that I would lose old backups. But still the backup is extremely slow. Now I can't install Lion or Mountain Lion from scratch without having to wait 10 hours for TM backup or installing tons of applications and settings again. Bummer. I'm never going to early adobt a OSX upgrade again.

E4200 Slow Wireless download and Network File Sharing

When I first got the E4200 up and running I was able to transfer files from my wireless laptop to a wired laptop at speeds of over 2 MBps(distance was over 40 ft). Now I have both laptops running wireless and a desktop that is wired via ethernet to the 4200 router and network file sharing runs much slower. Right now network transfer speeds are around 500-550 kBps.
Wireless network speeds are being affected also. Wi-fi d/l speeds via Cisco speed test is usually 5-6x slower than my wired speed tests, with upload speeds being faster than the d/l speed(Laptop is only 2 feet away from router for testing). And sometimes the wireless d/l speeds will slow down all the way to .15 mbps.
Has anyone come across this problem and found a fix for it, or have some suggestions? The router settings are mostly default and I have reset it to factory defaults via web interface and tried power cycling. But nothing so far has worked. I would hate to have to return this router and go back to the wrt54g.

Ok, well I tried all these and changing the MTU down to 1365 made it run real slow, so I found out the optimal mtu and switched between auto and manual 1500, and auto gave me more consistent speeds. It does seem to be running a bit faster with the name change of the 5 ghz band, and changing the channel of the 2.4 ghz band(Name changing 2.4 band did not make any noticable differences).
Right now I am getting download speeds around 10 mbps on the vista laptop(wireless), while the windows 7 desktop(wired) and laptop(wireless) are usually around 5.3-6 mbps. File sharing between the windows 7 machines are 4.3 MBps and 2.9 MBps between vista laptop and W7 desktop. Upload speeds on all machines are around 7mbps.
I am happier with the more consistent speeds between all machines instead of really fast between just 2, but am confused to why the vista laptop is running faster and my upload speed is faster than the download speeds on 2 of my machines.

File Sharing Service keeps crashing Error Reading Settings, File Sharing Service keeps crashing Error Reading Settings

File sharing service keeps popping up with the error message An error occurred on the server while processing a command. This error occurred while processing a command of type 'getConnectedUsers' in plug-in 'servermgr_afp'.
I have tried multiple solutions on this site, unloading afp and restarting it, restarting postgres. The file sharing tab will show up for a few seconds on the server.app config page then once someone tries to access any of the shared volumes on there, the event log shows it crashing instantly. Error in console:
The server '127.0.0.1' reported an error while processing a command of type 'getConnectedUsers' in plug-in: 'servermgr_afp'. Error: Error Domain=XSActionErrorDomain Code=0 "SETTING_NOT_FOUND_ERR" UserInfo=0x7ffe6a835060 {NSLocalizedDescription=SETTING_NOT_FOUND_ERR}
Also I get the error com.apple.launchd: (com.apple.collabd.notifications[7520]) Exited with code 1 then always followed by Throttling respawn: Will start in 10 seconds and this happens every 10 seconds without fail.

I have started getting this error this morning:
This error occurred while processing a command of type 'getConnectedUsers' in plug-in 'servermgr_afp'.
Using Server 2.2.2; MacMini running OS X 10.8.5, 2 GHz Core i7 with 8 GB RAM attached to a 12TB Pegasus RAID.
When the error appears, my users cease to be able to access file shares.
Often, just before the error occurs, my users experience substantial slow down in the Finder's responsiveness when manipulating files on those shares.
Restarting the Server App will produce one of several results
1. fix the problem (rarely)
2. fail to connect to server
3. connect to server but not get all services running.
The system itself resists a full shutdown, hanging at the grayish-white screen (not spinning wheel or cog or apple logo).
I wish there was some known fix for this.

How can I allow network users to use File Sharing on 10.8 Server?

I am in the process of setting up a new OS X 10.8 Server. I have exported/imported the network users from my previous OS X 10.6.8 Server using Workspace Manager. I have re-entered the passwords of the users. I have existing clients running (stil logged in).
I have set up the File Sharing service in Server.app. I have several mount points. I have made the Users mount point available for home directories over AFP.
Now, the system administrator can connect to the server and get access to the file shares. So the basic file sharing system works.
Also: the users on a client can get there password verified (e.g. when unlocking screen protection) by the server. It is just AFP they can't get access to, while the system administrator account (OD /Local on the server) can be used. So, the password in the server is OK too. It seems to be a matter of privileges.
But no network user (OD user in directory /LDAPv3/127.0.0.1 on the server) can get access. Where can I give network users privileges for File Sharing on the server?
I did try to add either the "Open Directory Users" group or a specific user that was imported into com.apple.access_afp. If I do that, there is partial success. I can connect to the server from the client with a user account other than system administrator from the server (but connecting is slow). But Mobile Home Sync does not work:
1:: [13/04/05 16:11:10.379] Scheduling next sync of "HomeSync_Mirror" at 2013-04-05 14:11:20 +0000
1:: [13/04/05 16:11:20.782] ==========================================================
0:: [13/04/05 16:11:20.782] Starting automatic sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:20.786] Peer "network" reports changes since last sync.
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:alias:]: isRemote = NO
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: peer = <SPeer_FS:0x7fd5a5009520> = local, optionalStoreID = (null), peer.storeIDString = *
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: rootPath        = /Users/gerben
1:: [13/04/05 16:11:20.786] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: storePath       = /Users/gerben/.FileSync/store.filesyncstatetree
1:: [13/04/05 16:11:20.787] [0x7fd5a9224760/<SStore_FS:0x105db3420>] +[SStore_FS newStore_FSForPeer:rootPath:rootAlias:rootRef:storePath:optionalStoreID:]: rootAlias       = {path='/Users/gerben', targetName='gerben', volumeName='Macintosh HD', type=DIR, volumeCreateDate=2010-08-10-12:58:16, targetCreateDate=2011-08-28-18:39:13, parentDirID=37638, nodeID=3003598, filesystemID=0000 ('0000'), signature=0x482b ('H+'), isBootVolume=YES, isAutomounted=NO, isEjectable=NO, hasPersistentFileIDs=YES, mounted=YES, url='file://localhost/'}
0:: [13/04/05 16:11:20.789] -[SPeer_FS _mountServerCallbackShares:status:]: received error 64
0:: [13/04/05 16:11:20.790] EXCEPTION: _mountServerCallbackShares:status: (Host is down) <-[SPeer_FS mountPeerVolumeWithURLString:] (Peer-FS.m:446): "'(-1)' error 64">
0:: [13/04/05 16:11:20.790] USERINFO: {
0:: [13/04/05 16:11:20.790]     NSLocalizedDescription = "Host is down";
0:: [13/04/05 16:11:20.790] }
0:: [13/04/05 16:11:20.790] BACKTRACE: {
0:: [13/04/05 16:11:20.790] ? | 0x105cb79b7
0:: [13/04/05 16:11:20.790] ? | 0x105cbf0e5
0:: [13/04/05 16:11:20.790] ? | 0x105c2c866
0:: [13/04/05 16:11:20.790] ? | 0x105c2babd
0:: [13/04/05 16:11:20.790] ? | 0x105c2acb4
0:: [13/04/05 16:11:20.790] ? | 0x7fff858bb72a
0:: [13/04/05 16:11:20.790] ? | 0x7fff858bb6a2
0:: [13/04/05 16:11:20.790] ? | 0x7fff874cf8bf
0:: [13/04/05 16:11:20.790] ? | 0x7fff874d2b75
0:: [13/04/05 16:11:20.790] }
1:: [13/04/05 16:11:20.790] Peer "network" is unable to sync. (-[SPeer_FS mountPeerVolumeWithURLString:] (Peer-FS.m:446): "'(-1)' error 64")
0:: [13/04/05 16:11:20.790] Peer "network" is unable to sync. Not enough peers will be available to continue syncing.
0:: [13/04/05 16:11:20.790] Aborting sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:20.790] -[SPeer abortSync] "local"
1:: [13/04/05 16:11:20.797] -[SStore_FS setupWithAlias:andRef:] (Store-FS.m:447): unlink('/Users/gerben/.FileSync/.fstemp.QW1Gh-bhvgEhVwmG3.noindex')
0:: [13/04/05 16:11:20.798] EXCEPTION: !IF <-[SPeer(protected) doPrepareForSyncWithResolvedConflicts:] (Peer.m:1149): "'(([self checkAbort]))'">
0:: [13/04/05 16:11:20.798] BACKTRACE: {
0:: [13/04/05 16:11:20.798] ? | 0x105c2bb66
0:: [13/04/05 16:11:20.798] ? | 0x105c2acb4
0:: [13/04/05 16:11:20.798] ? | 0x7fff858bb72a
0:: [13/04/05 16:11:20.798] ? | 0x7fff858bb6a2
0:: [13/04/05 16:11:20.798] ? | 0x7fff874cf8bf
0:: [13/04/05 16:11:20.798] ? | 0x7fff874d2b75
0:: [13/04/05 16:11:20.798] }
1:: [13/04/05 16:11:20.798] -[SStore_FS deleteStateTreeTurdFile] (Store-FS.m:476): unlink('/Users/gerben/.FileSync/store.filesyncstatetree.statetree_dirty')
1:: [13/04/05 16:11:20.798] Peer "local" is unable to sync. (-[SPeer(protected) doPrepareForSyncWithResolvedConflicts:] (Peer.m:1149): "'(([self checkAbort]))'")
0:: [13/04/05 16:11:20.798] Peer "local" is unable to sync. Not enough peers will be available to continue syncing.
1:: [13/04/05 16:11:20.798] EXCEPTION: SFAbortedException <-[SSyncEngine _waitForPeers:] (SyncEngine.m:1922): "'(_abort)'">
1:: [13/04/05 16:11:20.798] -[SSyncEngine threadMain_SyncEngine_sync:]: sync failed with exception "-[SSyncEngine _waitForPeers:] (SyncEngine.m:1922): "'(_abort)'"".
0:: [13/04/05 16:11:21.066] Sync of "HomeSync_Mirror" encountered errors. (_mountServerCallbackShares:status: (Host is down))
0:: [13/04/05 16:11:21.067] Last successful sync completed at 2013-04-04 20:17:15 +0000.
0:: [13/04/05 16:11:21.067] Finished sync of "HomeSync_Mirror".
1:: [13/04/05 16:11:21.067] Scheduling next sync of "HomeSync_Mirror" at 2013-04-05 14:31:21 +0000
1:: [13/04/05 16:11:21.284] 1-pass sync of "HomeSync_Mirror" took 0.02 seconds

Hi Gerben,
Try creating a brand new user, that's not imported and see if that works. Every user/group has a little gear in the Server.app/Users or Groups which allows specific access to specific services, perhaps filesharing is off in that section?
Is your DNS setup properly? Can you verify that clients can see the FQDN of your server?
After setting up the Users folder for mobilehomes, did you check whether the group and the separate users have access to filesharing? I am able to select the correct homefolder /Users and restrict the homefolder size.
Goodluck!
Jeffrey

Is there a way to force a file sharing user to log out?

I have a problem: I've got a few more Macs in my office that need to connect to my computer from time to time via file sharing than OS X Snow Leopard wants to allow. I know Apple wants me to use OS X Server but I don't want to lose the simplicity of my normal workflow. Part of the problem is that users are not logged out unless they manually close the file share, which means that, say, a laptop that's asleep will still be taking up one "file sharing user slow" even though it's not needed. I can see who is logged in via the command
set theUsers to do shell script "netstat -na | awk '/.548/ {print $5}'"
but want I need to know is, is there any way to force, say, user 192.168.1.8.50244 off of my file share without stopping and restarting file sharing, which logs everyone out (and breaks some of my scripts on other computers.
Any help would be appreciated.

You could start with this hint and go from there...
[Command Line Kung Fu #63|http://blog.commandlinekungfu.com/2009/10/episode-63-death-to-users.html]

Personal File Sharing on my eMac turns off by itself

I have three computers in my home office environment-- a eMac using Tiger fully updated--in fact it just came back from Apple Care doctors due to hard drive and memory issues-- (we think a power surge into my house caused it)--I also have a iBook-- four years old--running Tiger fully updated, but slow--- then I just got a MacBook running Leopard---- anyway I can get my laptops to network and share files, and I can get my eMac to connect to the laptops for file sharing, etc--- however, when I try to link the laptops to the eMac it hooks up for less than a minute, then I lose the connection--- it indicates issues with the connection, and on the MacBook yo use the link is gone. I go into the preferences in the eMac and see that the Personal File Sharing check box is no longer checked. I have tried resetting it, locking the preferences, etc. but I cannot get it to stay connected-- it is a minor issue, but one I would like to resolve--- thanks

Well, I have tried everything that you have indicated, including re-starting the eMac from the Tiger installer DVD and going to the Disc Utility and repairing the disc (nothing wrong) and repairing permissions-- lots needed corrections-- anyway, I still get the issue--- when I try to locate the eMac on the home netwrok, it looks like it hooks up for a second or so then I get a yellow triangle with an explanation mark in it saying the network is interrupted--and when I go into the system preferences the Personal File Sharing button is unchecked--- weird !!!
Ok, here are a couple of other interesting items-- when I go to the Go menu item and scroll down to the Network command, it will open a box for more than a split second the first time-- then not at all after that.
Secondly, when I do try to access the eMac, I do not ever get the little Connect to Server box asking for the short name and password to enter (??)-- also weird.
Any other suggestions--- this eMac was recently totally re-built-- new hard drive, new memory and new logic board-- (Seems I had a serious power surge in my office and it fried everything) -- I even had to re-install my printer and scanner software-- !!! Thanks for any suggestions.

Help with s-l-o-w-w-w-w-w Windows file sharing

After much hair-pulling, I finally got windows file sharing working on our 10.4.4 xserve (opening up ports 137-139 helped a lot!) - however I have noticed that directory navigation from the PC's are extremely slow... it takes about 25-30 seconds to navigate from one dir to another... once you navigate into a dir, and then back out, it seems that the next attempt into that same dir is very fast.
Any tips are appreciated.
Windows PC's are running XP Pro SP2.

There are several threads about improving Windows performance over smb. Do a search for "smb slow" to find them.
The single biggest thing you can do if you're dealing with a lot of little files is to do: sudo sysctl -w net.inet.tcp.delayed_ack=0
To add this permanently to your server add 'net.inet.tcp.delayed_ack=0' to /etc/sysctl.conf
There a bunch of other edits discussed here:
http://www.macosxhints.com/article.php?story=20040201121437157
=Tod

Slow Files Copy File Server DFS Namespace

I have two file servers running on VM both servers are on different physical servers.
Both connect with dfs namespace.
The problem part is both servers never have same copy speed.
Sometime very slow files copy about 1MBps on FS01 and fast copy 12MBps on FS02.
Sometime fast on FS01 and slow on FS02.
Sometime both of them slow..
So as usual I reboot the servers. Doesn't work.
Then I reboot the DC01 also doesn't work. There is another brother DC02.
After I reboot DC02, one of the FS become normal and another FS still slow.
FS01 and FS02 randomly. They never get faster speed together.
Users never complain slow FS because 1MBps is acceptable for them to open word excel etc.,.
The HUGE problem is I don't have backup when the slow FS days.
The problem since two weeks I'm giving up fixing it myself and need help from you expert guys.
Thanks!
DC01, DC02, FS01, FS02 (Win 2012 and All VMs)

Hi,
Since the slow copy is also occurred when you tried the direct copy from both shared folder, you could enable the disk write cache on the destination server to check the results.
HOW TO: Manually Enable/Disable Disk Write Caching
http://support.microsoft.com/kb/259716
Windows 2008 R2 - large file copy uses all available memory and then tranfer rate decreases dramatically (20x)
http://social.technet.microsoft.com/Forums/windowsserver/en-US/3f8a80fd-914b-4fe7-8c93-b06787b03662/windows-2008-r2-large-file-copy-uses-all-available-memory-and-then-tranfer-rate-decreases?forum=winservergen
You could also refer to the FAQ article to troubleshoot the slow copy issue:
[Forum FAQ] Troubleshooting Network File Copy Slowness
http://social.technet.microsoft.com/Forums/windowsserver/en-US/7bd9978c-69b4-42bf-90cd-fc7541ccb663/forum-faq-troubleshooting-network-file-copy-slowness?forum=winserverPN
Best Regards,
Mandy
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Slow File Sharing

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