[BACK]Return to tsld006.htm CVS log [TXT][DIR] Up to [Development] / xfs-website.orig / papers / DMF-over
File: [Development] / xfs-website.orig / papers / DMF-over / tsld006.htm (download)

Revision 1.1.1.1 (vendor branch), Wed Mar 29 22:34:38 2000 UTC (17 years, 7 months ago) by n8994
Branch: SGI_FW, MAIN
CVS Tags: START, HEAD
Changes since 1.1: +0 -0 lines 

Initial checkin

<HTML>

<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=windows-1252">
<meta name="GENERATOR" content="Microsoft Internet Assistant for PowerPoint 97">
 <TITLE>DMF - Capacity and Performance</TITLE> 
</HEAD>

<BODY     >

 <H1>DMF - Capacity and Performance</H1> 
 <P><UL>
<LI><H2>Number of files is determined by file system
</H2>
<UL>
<LI>Typical site -- 1M files
<LI>Largest site today -- 5M files
<LI>Largest tested capacity -- 20M files
<LI>Practical issue -- inode space and database processing time
</UL></UL><UL>
<LI><H2>Offline capacity is unlimited
</H2>
<UL>
<LI>Typical site -- 5 to 50TB
<LI>Largest site today -- 750TB ( and counting )
<LI>Practical issue -- media density
</UL></UL><UL>
<LI><H2>Data rates
</H2>
<UL>
<LI>Tunable media transport usage -- read/write
<LI>Full, rated channel speeds -- async i/o
<LI>Parallel writes/parallel reads
<LI>Busiest site -- 7 to 10 TB/day
<LI>Practical issue -- balance between disk channels and tape channels</UL></UL></P>
<P></P> 
<P>
<TABLE>
  <TD HEIGHT=100 WIDTH=100> <A HREF="tsld005.htm">Previous slide</A> </TD>
  <TD HEIGHT=100 WIDTH=100> <A HREF="tsld007.htm">Next slide</A> </TD>
  <TD HEIGHT=100 WIDTH=150> <A HREF="tsld001.htm">Back to first slide</A> </TD>
  <TD HEIGHT=100 WIDTH=150> <A HREF="sld006.htm">View graphic version</A> </TD>
</TABLE>
<BR>
</P>



</Body>
</HTML>