nfs服务器导出到300-400个客户端之间。 假设客户端A和B正在从nfs服务器同时复制同一个文件。 客户端A将做100mb / s，客户端B将做1-2mb / s。 然后一天之后，速度问题就会逆转。 客户端A下降到1-2mb / s。 我确定客户端的带宽没有饱和。 当它做1-2 / mbs时，我甚至努力做一个简单的LS或CD 。 在传输速度较慢的时候，dmesg或/ var / log / messages中没有任何内容。
eth0 RX数据包丢弃率在服务器上稳步增加。
NFS服务器：
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000 inet xxxx netmask 255.255.255.0 broadcast xxxx inet6 fe80::225:b5ff:feff:b000 prefixlen 64 scopeid 0x20<link> ether 00:25:b5:ff:b0:00 txqueuelen 10000 (Ethernet) RX packets 943628558144 bytes 616933252471494 (561.0 TiB) RX errors 0 dropped 760517201 overruns 0 frame 0 TX packets 294979961515 bytes 920493526252565 (837.1 TiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ethtool -S eth0 NIC statistics: tx_frames_ok: 295630824296 tx_unicast_frames_ok: 295630824219 tx_multicast_frames_ok: 10 tx_broadcast_frames_ok: 67 tx_bytes_ok: 921153721030047 tx_unicast_bytes_ok: 921153721024891 tx_multicast_bytes_ok: 868 tx_broadcast_bytes_ok: 4288 tx_drops: 0 tx_errors: 0 tx_tso: 147060374896 rx_frames_ok: 945863920948 rx_frames_total: 946625249253 rx_unicast_frames_ok: 946623896815 rx_multicast_frames_ok: 11 rx_broadcast_frames_ok: 1352427 rx_bytes_ok: 617220927332403 rx_unicast_bytes_ok: 617453019308584 rx_multicast_bytes_ok: 1006 rx_broadcast_bytes_ok: 86648192 rx_drop: 0 rx_no_bufs: 761328305 rx_errors: 0 rx_rss: 0 rx_crc_errors: 0 rx_frames_64: 7771228440 rx_frames_127: 609137402623 rx_frames_255: 153476479280 rx_frames_511: 56641135859 rx_frames_1023: 64839335794 rx_frames_1518: 490685265 rx_frames_to_max: 54268981993 nfsstat -o all Server packet stats: packets udp tcp tcpconn 2740643409 1180 2740494779 1113812 Server rpc stats: calls badcalls badclnt badauth xdrcall 2740451952 1701 1141 560 0 Server reply cache: hits misses nocache 185594 1806160969 934275416 Server file handle cache: lookup anon ncachedir ncachedir stale 0 0 0 0 321859 Server nfs v3: null getattr setattr lookup access readlink 8802 0% 18074261 0% 787773 0% 1255878 0% 10635785 0% 10426 0% read write create mkdir symlink mknod 866194719 31% 1802944793 66% 189292 0% 60196 0% 2035 0% 0 0% remove rmdir rename link readdir readdirplus 201351 0% 73802 0% 5602 0% 7 0% 238 0% 2409689 0% fsstat fsinfo pathconf commit 16534863 0% 2446 0% 1221 0% 1928896 0% Server nfs v4: null compound 25 0% 18886392 99% Server nfs v4 operations: op0-unused op1-unused op2-future access close commit 0 0% 0 0% 0 0% 108199 0% 32860 0% 15836 0% create delegpurge delegreturn getattr getfh link 1063 0% 0 0% 0 0% 17273601 43% 51634 0% 0 0% lock lockt locku lookup lookup_root nverify 26 0% 0 0% 26 0% 44202 0% 0 0% 0 0% open openattr open_conf open_dgrd putfh putpubfh 38101 0% 0 0% 30 0% 27 0% 18572115 47% 0 0% putrootfh read readdir readlink remove rename 23 0% 1018545 2% 48615 0% 15 0% 140807 0% 21397 0% renew restorefh savefh secinfo setattr setcltid 334450 0% 0 0% 21399 0% 11 0% 43468 0% 31 0% setcltidconf verify write rellockowner bc_ctl bind_conn 31 0% 0 0% 1739003 4% 25 0% 0 0% 0 0% exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo 0 0% 0 0% 0 0% 0 0% 0 0% 0 0% getdevlist layoutcommit layoutget layoutreturn secinfononam sequence 0 0% 0 0% 0 0% 0 0% 0 0% 0 0% set_ssv test_stateid want_deleg destroy_clid reclaim_comp 0 0% 0 0% 0 0% 0 0% 0 0% NFS客户端
nfsstat Client rpc stats: calls retrans authrefrsh 1187938914 59869 1188488980