zfs-clu-01a rpcmod: [ID 851375 kern.warning] WARNING: svc_cots_kdup no slots 
free
zfs-clu-01a last message repeated 75220 times

我们在ZFS上使用NFS时遇到了很多麻烦.
实际上我们不能通过NFS复制大文件(> 500mo),我们有性能
的问题.

NFS client using NFSv3 over TCP

**--NFS Server Configuration :**

Concurrent NFSD Servers: 4096
NFSD queue length: 512
Concurrent LOCKD Servers: 4096
LOCKD queue length 512

**-- System configuration** 

**1/ Disable ZIL**
Settings -> Preferences -> System
Sys_zfs_nocacheflush            Yes (default: No)
Warning: it is unsafe without UPS

**2/Disable Nagel algoritm**
Settings -> Preferences -> Network
Net_tcp_naglim_def              1 (default: 4095)

**4/ disable sync**
Data Management -> Shares -> Folder xxx
Sync      disable (default: Standard)

如果需要,我可以提供更多信息.

——– UPDATE 01 ————-

我有一个新的有趣的事情：

这个问题只有或者最常见于“centos”系统(6.5版本)

与Debian(上一版本)相同的是在同一时间段内在此文件副本上运行良好

以下是更多信息：

OS: Nexenta Ver. 31-5-0
    Load Average 1.25,1.26,1.21
    NFSv3 Server (configuration in my last email)

1)NFS客户端

Clients Number: 15 with very high access demand  and then we have more than 20 others low access
    Centos 6 and Debian 7
    NFS Client v3
    Mout options :
    nfs (rw,noatime,nodiratime,vers=3,rsize=16384,wsize=16384,proto=tcp,mountproto=tcp,nolock)
    Nics: 1x 1g
    Dedicated NFS vlan

2)zpool列表

NAME     SIZE ALLOC  FREE CAP DEDUP HEALTH ALTROOT
    syspool  464G 181G   283G 39% 1.00x ONLINE -
    tank1   6.52T 2.38T 4.13T 36% 1.00x ONLINE -

3)zpool状态

pool: syspool
    state: ONLINE
    scan: none requested
    config:
    NAME STATE READ WRITE CKSUM
    syspool  ONLINE 0 0 0
    c0t0d0s0 ONLINE 0 0 0
    errors: No known data errors
    pool: tank1
    state: ONLINE
    scan: resilvered 190G in 81h49m with 0 errors on Sun Jan 26 15:35:10 2014

    config:
    NAME STATE READ WRITE CKSUM
    tank1 ONLINE 0 0 0
    mirror-0 ONLINE 0 0 0
        c6t5000C5005F0C34A7d0 ONLINE 0 0 0
        c6t5000C5005F1261CBd0 ONLINE 0 0 0
    mirror-1 ONLINE 0 0 0
            c6t5000C5005F531E2Fd0 ONLINE 0 0 0
            c6t5000C5005FD1677Fd0 ONLINE 0 0 0
    mirror-2 ONLINE 0 0 0
            c6t5000C5005FD18BF7d0 ONLINE 0 0 0
            c6t5000C5005FD1907Bd0 ONLINE 0 0 0
    mirror-3 ONLINE 0 0 0
            c6t50000394B820EA30d0 ONLINE 0 0 0
            c6t5000C5005FD1D133d0 ONLINE 0 0 0
    mirror-4 ONLINE 0 0 0
            c6t5000C5005FD73F97d0 ONLINE 0 0 0
            c6t5000C5005FD7518Bd0 ONLINE 0 0 0
    mirror-5 ONLINE 0 0 0
            c6t5000C5005FD7C2A3d0 ONLINE 0 0 0
            c6t5000C5005FDC123Bd0 ONLINE 0 0 0
    mirror-6 ONLINE 0 0 0
            c6t5000C5005FDE1D13d0 ONLINE 0 0 0
            c6t5000C5005FDEAFDFd0 ONLINE 0 0 0
    mirror-7 ONLINE 0 0 0
            c6t5000C5005FDEB127d0 ONLINE 0 0 0
            c6t5000C5005FDEB513d0 ONLINE 0 0 0
    mirror-8 ONLINE 0 0 0
            c6t5000C5005FDF88CBd0 ONLINE 0 0 0
            c6t5000C5005FDF9C4Fd0 ONLINE 0 0 0
    mirror-9 ONLINE 0 0 0
            c6t5000C50067802A17d0 ONLINE 0 0 0
            c6t5000C500678037A7d0 ONLINE 0 0 0
    mirror-10 ONLINE 0 0 0
            c6t5000C5006780D6F7d0 ONLINE 0 0 0
            c6t5000C5006780DEB3d0 ONLINE 0 0 0
    mirror-11 ONLINE 0 0 0
            c6t5000C5006780E90Fd0 ONLINE 0 0 0
            c6t5000C5006780E99Bd0 ONLINE 0 0 0
    cache
    c0t1d0 ONLINE 0 0 0
    c0t2d0 ONLINE 0 0 0
    spares
    c6t5000C5006BF8C91Fd0 AVAIL
    errors: No known data errors

4)hddisco

=c6t5000C5006BF8C91Fd0
    driver sd
    driver_instance 37
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS08
    serial S0M19QGA
    guid 5000c5006bf8c91f
    device_id id1,sd@n5000c5006bf8c91f
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5006bf8c91d
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5006bf8c91e
    P end
    =c6t5000C5005F531E2Fd0
    driver sd
    driver_instance 26
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M04DCN
    guid 5000c5005f531e2f
    device_id id1,sd@n5000c5005f531e2f
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005f531e2d
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005f531e2e
    P end
    =c6t5000C5005FDEAFDFd0
    driver sd
    driver_instance 27
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M061KF
    guid 5000c5005fdeafdf
    device_id id1,sd@n5000c5005fdeafdf
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdeafdd
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdeafde
    P end
    =c6t5000C5006780E90Fd0
    driver sd
    driver_instance 29
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M06GV9
    guid 5000c5006780e90f
    device_id id1,sd@n5000c5006780e90f
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5006780e90d
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5006780e90e
    P end
    =c6t5000C5005FD1677Fd0
    driver sd
    driver_instance 28
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M05WCR
    guid 5000c5005fd1677f
    device_id id1,sd@n5000c5005fd1677f
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd1677d
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd1677e
    P end
    =c6t5000C5005FDF9C4Fd0
    driver sd
    driver_instance 30
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M03SZR
    guid 5000c5005fdf9c4f
    device_id id1,sd@n5000c5005fdf9c4f
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdf9c4d
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdf9c4e
    P end
    =c6t5000C5005FD7518Bd0
    driver sd
    driver_instance 25
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M06JCM
    guid 5000c5005fd7518b
    device_id id1,sd@n5000c5005fd7518b
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd75189
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd7518a
    P end
    =c6t5000C5005F1261CBd0
    driver sd
    driver_instance 24
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M03LZY
    guid 5000c5005f1261cb
    device_id id1,sd@n5000c5005f1261cb
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005f1261c9
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005f1261ca
    P end
    =c6t5000C5006780E99Bd0
    driver sd
    driver_instance 20
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M06GV8
    guid 5000c5006780e99b
    device_id id1,sd@n5000c5006780e99b
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5006780e999
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5006780e99a
    P end
    =c6t5000C5005FD1907Bd0
    driver sd
    driver_instance 23
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M0657D
    guid 5000c5005fd1907b
    device_id id1,sd@n5000c5005fd1907b
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd19079
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd1907a
    P end
    =c6t5000C5005FDF88CBd0
    driver sd
    driver_instance 22
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M04CQ7
    guid 5000c5005fdf88cb
    device_id id1,sd@n5000c5005fdf88cb
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdf88c9
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdf88ca
    P end
    =c6t5000C5005FDC123Bd0
    driver sd
    driver_instance 21
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M05WMD
    guid 5000c5005fdc123b
    device_id id1,sd@n5000c5005fdc123b
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdc1239
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdc123a
    P end
    =c6t5000C5006780D6F7d0
    driver sd
    driver_instance 19
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M05TVK
    guid 5000c5006780d6f7
    device_id id1,sd@n5000c5006780d6f7
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5006780d6f5
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5006780d6f6
    P end
    =c6t5000C5005FDEB127d0
    driver sd
    driver_instance 13
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M061JX
    guid 5000c5005fdeb127
    device_id id1,sd@n5000c5005fdeb127
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdeb125
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdeb126
    P end
    =c6t5000C5005FD73F97d0
    driver sd
    driver_instance 16
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M06J86
    guid 5000c5005fd73f97
    device_id id1,sd@n5000c5005fd73f97
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd73f95
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd73f96
    P end
    =c6t5000C5005F0C34A7d0
    driver sd
    driver_instance 14
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M0405D
    guid 5000c5005f0c34a7
    device_id id1,sd@n5000c5005f0c34a7
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005f0c34a5
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005f0c34a6
    P end
    =c6t5000C500678037A7d0
    driver sd
    driver_instance 15
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M03FNP
    guid 5000c500678037a7
    device_id id1,sd@n5000c500678037a7
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c500678037a5
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c500678037a6
    P end
    =c6t5000C5005FD18BF7d0
    driver sd
    driver_instance 17
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M0659G
    guid 5000c5005fd18bf7
    device_id id1,sd@n5000c5005fd18bf7
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd18bf5
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd18bf6
    P end
    =c6t5000C50067802A17d0
    driver sd
    driver_instance 18
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M03WJV
    guid 5000c50067802a17
    device_id id1,sd@n5000c50067802a17
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c50067802a15
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c50067802a16
    P end
    =c6t50000394B820EA30d0
    driver sd
    driver_instance 32
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor TOSHIBA
    product AL13SEB600
    revision DE06
    serial 43L0A02HFRD3
    guid 50000394b820ea30
    device_id id1,sd@n50000394b820ea30
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    mpxio_enabled yes
    parent mpxio
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    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w50000394b820ea32
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w50000394b820ea33
    P end
    =c6t5000C5005FDE1D13d0
    driver sd
    driver_instance 11
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M060LE
    guid 5000c5005fde1d13
    device_id id1,sd@n5000c5005fde1d13
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fde1d11
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fde1d12
    P end
    =c6t5000C5005FDEB513d0
    driver sd
    driver_instance 6
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M061HL
    guid 5000c5005fdeb513
    device_id id1,sd@n5000c5005fdeb513
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fdeb511
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fdeb512
    P end
    =c6t5000C5005FD7C2A3d0
    driver sd
    driver_instance 9
    device_type disk
    removable no
    media_present yes
    size 600127266816
    size_str 558.9GB
    caching_supported no
    vendor SEAGATE
    product ST600MM0006
    revision LS06
    serial S0M06HG0
    guid 5000c5005fd7c2a3
    device_id id1,sd@n5000c5005fd7c2a3
    is_ssd no
    mpxio_enabled yes
    parent mpxio
    parent_instance 0
    path_count 2
    P start
    P parent mpt_sas
    P parent_instance 5
    P path_state ONLINE
    P target_port w5000c5005fd7c2a1
    P end
    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
    P target_port w5000c5005fd7c2a2
    P end
    =c6t5000C5005FD1D133d0
    driver sd
    driver_instance 7
    device_type disk
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    guid 5000c5005fd1d133
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    P parent mpt_sas
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    P start
    P parent mpt_sas
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    =c6t5000C5006780DEB3d0
    driver sd
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    product ST600MM0006
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    guid 5000c5006780deb3
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    P start
    P parent mpt_sas
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    P start
    P parent mpt_sas
    P parent_instance 4
    P path_state ONLINE
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    P end
    =c0t2d0
    driver sd
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    guid 6b8ca3a0e767ac00199eeec20c4cd122
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    =c0t1d0
    driver sd
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    guid 6b8ca3a0e767ac00199eeead0b06a427
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    =c0t0d0
    driver sd
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