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nexedi
ZODB
Commits
b3c56c0b
Commit
b3c56c0b
authored
Sep 28, 2015
by
Maurits van Rees
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Minor fixes to new overview.
parent
e90f3aa5
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b3c56c0b
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@@ -63,12 +63,12 @@ ZODB transaction support:
This allows transactions to span multiple ZODB databases and to span
ZODB and non-ZODB databases.
Other
other
notable ZODB features
===========================
======
Other notable ZODB features
===========================
Pluggable layered storage
ZODB has a pluggable storage architecture. This allows a variety of
storage schemes including memory-based, file-based and distribute
s
storage schemes including memory-based, file-based and distribute
d
(client-server) storage. Through storage layering, storage
components provide compression, encryption, replication and more.
...
...
@@ -90,7 +90,7 @@ Testing is very easy.
database-related code very easy.
Time travel
ZODB storages typically add new records on write and remove
s
old
ZODB storages typically add new records on write and remove old
records on "pack" operations. This allows limited time travel, back
to the last pack time. This can be very useful for forensic
analysis.
...
...
@@ -132,7 +132,7 @@ When the dominant access method is by accessing object attributes or by calling
technologies might be a better fit.
ZODB has no query language other than Python. It's primary support
for search is through mapping object called BTrees. People have
for search is through mapping object
s
called BTrees. People have
build higher-level search APIs on top of ZODB. These work well
enough to support some search.
...
...
@@ -141,7 +141,7 @@ When you read data a lot more than you write it
fits) in memory, performance is very good because it rarely has to
touch the database server.
If your application i
f
very write heavy (e.g. logging), then you're
If your application i
s
very write heavy (e.g. logging), then you're
better off using something else. Sometimes, you can use a database
suitable for heavy writes in combination with ZODB.
...
...
@@ -172,13 +172,13 @@ When should you *not* use ZODB?
How does ZODB scale?
====================
Not
e
as well as many technologies, but some fairly large applications
Not as well as many technologies, but some fairly large applications
have been built on ZODB.
At Zope Corporation, several hundred newspaper content-management
systems and web sites were hosted using a multi-database configuration
with most data in a main database and a catalog database. The
databases ha
s
several hundred gigabytes of ordinary database records
databases ha
ve
several hundred gigabytes of ordinary database records
plus multiple terabytes of blob data.
ZODB is mature
...
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@@ -215,7 +215,7 @@ Community and contributing
Discussion occurs on the `ZODB mailing list
<https://groups.google.com/forum/#!forum/zodb>`_. (And for the
transaction system on the `transaction list
<https://groups.google.com/forum/#!forum/python-transaction>`_
<https://groups.google.com/forum/#!forum/python-transaction>`_
)
Bug reporting and feature requests are submitted through github issue
trackers for various ZODB components:
...
...
@@ -224,7 +224,7 @@ trackers for various ZODB components:
- `persistent <https://github.com/zopefoundation/persistent>`_
- `transact
u
on <https://github.com/zopefoundation/transaction>`_
- `transact
i
on <https://github.com/zopefoundation/transaction>`_
- `BTrees <https://github.com/zopefoundation/BTrees>`_
...
...
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