http://www.eggplant.pro/blog/faster-samba-smb-cifs-share-performance/
Is your Samba slow?
Samba file sharing is great, but performance under Samba’s default configuration is fairly poor.
Here are a few options that I add to my smb.conf to get the speed that I need:
# FORCE THE DISK SYSTEM TO ALLOCATE REAL STORAGE BLOCKS WHEN # A FILE IS CREATED OR EXTENDED TO BE A GIVEN SIZE. # THIS IS ONLY A GOOD OPTION FOR FILE SYSTEMS THAT SUPPORT # UNWRITTEN EXTENTS LIKE XFS, EXT4, BTRFS, OCS2. # IF YOU USE A FILE SYSTEM THAT DOES NOT SUPPORT UNWRITTEN # EXTENTS, SET "strict allocate = no". strict allocate = Yes # ALLOW READS OF 65535 BYTES IN ONE PACKET. # THIS TYPICALLY PROVIDES A MAJOR PERFORMANCE BENEFIT. read raw = Yes # SUPPORT RAW WRITE SMBs WHEN TRANSFERRING DATA FROM CLIENTS. write raw = Yes # WHEN "strict locking = no", THE SERVER PERFORMS FILE LOCK # CHECKS ONLY WHEN THE CLIENT EXPLICITLY ASKS FOR THEM. # WELL-BEHAVED CLIENTS ALWAYS ASK FOR LOCK CHECKS WHEN IT IS # IMPORTANT, SO IN THE VAST MAJORITY OF CASES, # "strict locking = auto" OR "strict locking = no" IS ACCEPTABLE. strict locking = No # TCP_NODELAY: # SEND AS MANY PACKETS AS NECESSARY TO KEEP DELAY LOW # IPTOS_LOWDELAY: # [Linux IPv4 Tweak] MINIMIZE DELAYS FOR INTERACTIVE TRAFFIC # SO_RCVBUF: # ENLARGE SYSTEM SOCKET RECEIVE BUFFER # SO_SNDBUF: # ENLARGE SYSTEM SOCKET SEND BUFFER socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=131072 SO_SNDBUF=131072 # SMBWriteX CALLS GREATER THAN "min receivefile size" WILL BE # PASSED DIRECTLY TO KERNEL recvfile/splice SYSTEM CALL. # TO ENABLE POSIX LARGE WRITE SUPPORT (SMB/CIFS WRITES UP TO 16MB), # THIS OPTION MUST BE NONZERO. # THIS OPTION WILL HAVE NO EFFECT IF SET ON A SMB SIGNED CONNECTION. # MAX VALUE = 128k min receivefile size = 16384 # USE THE MORE EFFICIENT sendfile() SYSTEM CALL FOR EXCLUSIVELY # OPLOCKED FILES. # NOTE: ONLY FOR CLIENTS HIGHER THAN WINDOWS 98/Me use sendfile = true # READ FROM FILE ASYNCHRONOUSLY WHEN SIZE OF REQUEST IS BIGGER # THAN THIS VALUE. # NOTE: SAMBA MUST BE BUILT WITH ASYNCHRONOUS I/O SUPPORT aio read size = 16384 # WRITE TO FILE ASYNCHRONOUSLY WHEN SIZE OF REQUEST IS BIGGER # THAN THIS VALUE # NOTE: SAMBA MUST BE BUILT WITH ASYNCHRONOUS I/O SUPPORT aio write size = 16384
A few other references:
