Samba jõudluse parandamine

Autor

Martin Raudsik

Sissejuhatus

Selleks, et Samba jõudlust parandada, tuleb konfigureerida SOCKET OPTIONS

Socket options

TCP_NODELAY - Have the server send as many packets as necessary to keep delay low. This is used on telnet connections to give good response time, and is used - somewhat counter-intuitively - to get good speed even when doing small requests or when acknowledgments are delayed (as seems to occur with Microsoft TCP/IP). This is worth a 30-50 percent speedup by itself. Incidentally, in Samba 2.0.4, socket options = TCP_NODELAY became the default value for that option.

IPTOS_LOWDELAY - This is another option that trades off throughput for lower delay, but which affects routers and other systems, not the server. All the IPTOS options are new; they're not supported by all operating systems and routers. If they are supported, set IPTOS_LOWDELAY whenever you set TCP_NODELAY.

SO_SNDBUF and SO_RCVBUF - The send and receive buffers can often be the reset to a value higher than that of the operating system. This yields a marginal increase of speed (until it reaches a point of diminishing returns)

SO_KEEPALIVE - This initiates a periodic (four-hour) check to see if the client has disappeared. Expired connections are addressed somewhat better with Samba's keepalive and dead time options. All three eventually arrange to close dead connections, returning unused memory and process-table entries to the operating system.