1 <samba:parameter name="fake oplocks"
4 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
6 <para>Oplocks are the way that SMB clients get permission
7 from a server to locally cache file operations. If a server grants
8 an oplock (opportunistic lock) then the client is free to assume
9 that it is the only one accessing the file and it will aggressively
10 cache file data. With some oplock types the client may even cache
11 file open/close operations. This can give enormous performance benefits.
14 <para>When you set <command moreinfo="none">fake oplocks = yes</command>, <citerefentry>
15 <refentrytitle>smbd</refentrytitle><manvolnum>8</manvolnum></citerefentry> will
16 always grant oplock requests no matter how many clients are using the file.</para>
18 <para>It is generally much better to use the real <smbconfoption name="oplocks"/> support rather
19 than this parameter.</para>
21 <para>If you enable this option on all read-only shares or
22 shares that you know will only be accessed from one client at a
23 time such as physically read-only media like CDROMs, you will see
24 a big performance improvement on many operations. If you enable
25 this option on shares where multiple clients may be accessing the
26 files read-write at the same time you can get data corruption. Use
27 this option carefully!</para>
29 <value type="default">no</value>