Service Foundation and Optimization for NFS

One, NFS Master profile (default is empty):
/etc/exports
Format:
Shared directory share address 1 (parameter 1, parameter 2, ...) ) share address 2 (parameter 1, parameter 2, ...). ）
Attention:
Local permissions for the shared directory, and if read-write sharing is required, make sure that the local directory is read and written by the user of the NFS client (nfsnobody)
Important Parameters:
RW Read and Write permissions
RO Read-only permissions
Async Async, Features: 1) fast, 2) risk of data loss
Sync Sync, Features: 1) slow, 2) data security
All_squash to suppress permissions as anonymous users
Anonuid,anongid specifying user uid and GID
Second, production skills

1. Ensure that all servers have the same permissions on the NFS shared directory
A, All_squash all the clients are compressed into anonymous users.
B, anonuid,anongid the specified UID and GID user
2, all clients and service side need to have a same UID and GID user, namely Nfsnobody
Service Management commands for NFS:
/usr/sbin/exportfs
/etc/init.d/nfs Reload equivalent to EXPORTFS-RV
EXPORTFS can share directories directly by command
/usr/sbin/showmount
View NFS Configuration and Mount conditions
/var/lib/nfs/etab
Record mount default parameters

Three, fault analysis ideas:
1) Check the network, port and firewall settings
2) Check that the server and client services are up and running

Iv. NFS Client Mount default values

Cat/proc/mounts

Five, optimize

1, disk selection, disk array configuration scheme

2, NFS server configuration parameters Optimization

All_squash,root_squash and other parameters used

3. Client Mount NFS Optimization scheme
CentOS 6.5 x86_64, parametric optimization
Nosuid,noatime,nodiratime,rw,noexec,hard,intr

4, the official kernel optimization
Vim/etc/sysctl.conf
Net.core.wmem_default = 8388608
Net.core.rmem_default = 8388608
Net.core.wmem_max = 16777216
Net.core.rmem_max = 16777216

Vi. Common commands for NFS services

#  viewing server-side Mount information         [[email protected]_client ~]#  showmount -e 192.168.1.112export list for 192.168.1.112:/data 192.168.1.0/24#   Reload Mount configuration [[email protected]_server ~]# exportfs -rvexporting 192.168.1.0/24:/ data#  load shared configuration on the command line [[email protected]_server ~]# exportfs -o rw,sync  192.168.1.0:/data#  View Rpcbind Service status [[email protected]_server ~]# rpcinfo -p  localhost   program vers proto   port  service     100000    4   tcp    111   portmapper    100000    3   tcp     111  portmapper    100000    2   tcp     111  portmapper    100000    4   udp    111   portmapper    100000    3   udp     111  portmapper    100000    2   udp     111  portmapper    100011    1    udp    875  rquotad    100011     2   udp    875  rquotad    100011     1   tcp    875  rquotad     100011    2   tcp    875  rquotad     100005    1   udp  39438  mountd     100005    1   tcp  48816  mountd     100005    2   udp  44018  mountd     100005    2   tcp  39398  mountd     100005    3   udp  53548  mountd     100005    3   tcp  59923  mountd     100003    2   tcp   2049   nfs    100003    3   tcp   2049   nfs    100003    4   tcp   2049   nfs    100227    2   tcp    2049  nfs_acl    100227    3   tcp   2049  nfs_acl     100003    2   udp   2049  nfs     100003    3   udp   2049   nfs    100003    4   udp   2049   nfs    100227    2   udp   2049   nfs_acl    100227    3   udp    2049  nfs_acl    100021    1   udp   56706  nlockmgr    100021    3    udp  56706  nlockmgr    100021    4    udp  56706  nlockmgr    100021    1   tcp  47320   nlockmgr    100021    3   tcp   47320  nlockmgr    100021    4   tcp   47320  nlockmgr

This article is from the "topspeed_king" blog, make sure to keep this source http://mylinuxlife.blog.51cto.com/4706737/1672088

Service Foundation and Optimization for NFS