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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 17] 17.25 Keeping find From Searching Networked Filesystems</TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly & Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:38:46Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-260-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="ch17_01.htm"TITLE="17. Finding Files with find"><LINKREL="prev"HREF="ch17_24.htm"TITLE="17.24 Skipping Some Parts of a Tree in find (A More Selective -prune)"><LINKREL="next"HREF="ch18_01.htm"TITLE="18. Linking, Renaming, and Copying Files"></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><DIVCLASS="htmlnav"><H1><IMGSRC="gifs/smbanner.gif"ALT="UNIX Power Tools"USEMAP="#srchmap"BORDER="0"></H1><MAPNAME="srchmap"><AREASHAPE="RECT"COORDS="0,0,466,58"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="467,0,514,18"HREF="jobjects/fsearch.htm"ALT="Search this book"></MAP><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch17_24.htm"TITLE="17.24 Skipping Some Parts of a Tree in find (A More Selective -prune)"><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 17.24 Skipping Some Parts of a Tree in find (A More Selective -prune)"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 17<BR>Finding Files with find</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="CHAPTER"HREF="ch18_01.htm"TITLE="18. Linking, Renaming, and Copying Files"><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 18. Linking, Renaming, and Copying Files"BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-7942">17.25 Keeping find From Searching Networked Filesystems</A></H2><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-20008"></A><ACLASS="indexterm"NAME="AUTOID-20011"></A><ACLASS="indexterm"NAME="AUTOID-20014"></A>The most painful aspect of a large<SPANCLASS="link">NFS (<ACLASS="linkend"HREF="ch01_33.htm"TITLE="UNIX Networking and Communications ">1.33</A>)</SPAN>environment is avoiding the access offiles on NFS servers that are down.<EMCLASS="emphasis">find</EM>is particularly sensitive to this, because it is very easy toaccess dozens of machines with a single command.If<EMCLASS="emphasis">find</EM>tries to explore a file server that happens to be down, it will timeout. It is important to understand how to prevent<EMCLASS="emphasis">find</EM>from going too far.</P><PCLASS="para">To do this, use<EMCLASS="emphasis">-prune</EM>with<ACLASS="indexterm"NAME="AUTOID-20023"></A><EMCLASS="emphasis">-fstype</EM>or<ACLASS="indexterm"NAME="AUTOID-20027"></A><EMCLASS="emphasis">-xdev</EM>.[Unfortunately, not all <EMCLASS="emphasis">find</EM>s have all of these. <EMCLASS="emphasis">-JP</EM> ]<EMCLASS="emphasis">fstype</EM>tests for filesystem types, and expects an argument like<EMCLASS="emphasis">nfs</EM>or<EMCLASS="emphasis">4.2</EM>.The latter refers to the "fast filesystem" introduced in the 4.2release of theBerkeley Software Distribution.To limit<EMCLASS="emphasis">find</EM>to files only on a local disk or disks, use the clause<EMCLASS="emphasis">-fstype 4.2 -prune</EM>or<EMCLASS="emphasis">-o -fstype nfs -prune</EM>.</P><PCLASS="para">To limit the search to one particular disk partition,use<EMCLASS="emphasis">-xdev</EM>.For example, if you need to clear out a congested disk partition,you could look for all files greater than 40 blocks on the currentdisk partition with this command:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>find . -size +40 -xdev -print</B></CODE></PRE></BLOCKQUOTE></P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">BB</SPAN></P></DIV></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch17_24.htm"TITLE="17.24 Skipping Some Parts of a Tree in find (A More Selective -prune)"><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 17.24 Skipping Some Parts of a Tree in find (A More Selective -prune)"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="book"HREF="index.htm"TITLE="UNIX Power Tools"><IMGSRC="gifs/txthome.gif"SRC="gifs/txthome.gif"ALT="UNIX Power Tools"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="CHAPTER"HREF="ch18_01.htm"TITLE="18. 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