Commit 0bb2eb3e authored by Guido van Rossum's avatar Guido van Rossum

A few edits suggested by Barry.

parent 7e7ad599
...@@ -6,16 +6,17 @@ What's ZEO? ...@@ -6,16 +6,17 @@ What's ZEO?
=========== ===========
ZEO stands for Zope Enterprise Objects. ZEO is an add-on for Zope ZEO stands for Zope Enterprise Objects. ZEO is an add-on for Zope
that allows a ZODB storage to live on a separate machine, which is that allows a multiple processes to connect to a single ZODB storage.
accessed via a network by multiple Zope instances. ZEO 2 has many Those processes can live on different machines, but don't need to.
improvements over ZEO 1, and is incompatible with ZEO 1; if you ZEO 2 has many improvements over ZEO 1, and is incompatible with ZEO
upgrade an existing ZEO 1 installation, you must upgrade the server 1; if you upgrade an existing ZEO 1 installation, you must upgrade the
and all clients simultaneous. If you received ZEO 2 as part of the server and all clients simultaneous. If you received ZEO 2 as part of
ZODB 3 distribution, the ZEO 1 sources are provided in a separate the ZODB 3 distribution, the ZEO 1 sources are provided in a separate
directory (ZEO1). Some documentation for ZEO is available in the ZODB directory (ZEO1). Some documentation for ZEO is available in the ZODB
3 package in the Doc subdirectory. ZEO depends on the ZODB software; 3 package in the Doc subdirectory. ZEO depends on the ZODB software;
it can be used with the version of ZODB distributed with Zope 2.5.1 or it can be used with the version of ZODB distributed with Zope 2.5.1 or
later. More information about ZEO can be found on its home on the web: later. More information about ZEO can be found on its home on the
web:
http://www.zope.org/Products/ZEO/ http://www.zope.org/Products/ZEO/
...@@ -45,8 +46,8 @@ zrpc/ subpackage implementing Remote Procedure Call (RPC) ...@@ -45,8 +46,8 @@ zrpc/ subpackage implementing Remote Procedure Call (RPC)
Client Cache Tracing Client Cache Tracing
==================== ====================
An important question for ZEO users is, how large should the ZEO An important question for ZEO users is: how large should the ZEO
client cache be. ZEO 2 (as of ZEO 2.0b2) has a new feature that lets client cache be? ZEO 2 (as of ZEO 2.0b2) has a new feature that lets
you collect a trace of cache activity and tools to analyze this trace, you collect a trace of cache activity and tools to analyze this trace,
enabling you to make an informed decision about the cache size. enabling you to make an informed decision about the cache size.
...@@ -64,8 +65,8 @@ problems with the file, a log message is written to the standard Zope ...@@ -64,8 +65,8 @@ problems with the file, a log message is written to the standard Zope
log file. To start or stop tracing, the ZEO client process (typically log file. To start or stop tracing, the ZEO client process (typically
a Zope application server) must be restarted. a Zope application server) must be restarted.
The trace file can grow pretty fast; on a moderately loaded server, we The trace file can grow pretty quickly; on a moderately loaded server,
observed it growing by 5 MB per hour. The file consists of binary we observed it growing by 5 MB per hour. The file consists of binary
records, each 24 bytes long; a detailed description of the record records, each 24 bytes long; a detailed description of the record
lay-out is given in stats.py. No sensitive data is logged. lay-out is given in stats.py. No sensitive data is logged.
......
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