Plone on RelStorage

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In this presentation we will discuss what Relstroage is, and the effect it can have on your Plone site. We will compare different Relstorage backends (MySQL and PostgreSQL) and how they perform compared to the default filestorage. We will also discuss why you may or may not want to use Relstorage in your environment. We will also review any changes you will need to make to your environment to maintain Relstorage.

Tecnologia

Plone on RelStorage
Calvin Hendryx-Parker
PLONE CONFERENCE 2010
Saturday, October 30, 2010

PLONE CONFERENCE 2010Overview
• How does Zope store data
• Why RelStorage?
• How to implement RelStorage
• Some reasons not to use RelStorage
Saturday, October 30, 2010

PLONE CONFERENCE 2010Zope Storage
Methods
Saturday, October 30, 2010

PLONE CONFERENCE 2010What is the ZODB?
• Object oriented database
• Used by Zope to hold everything from content
to scripts, to service conﬁgurations
Saturday, October 30, 2010

PLONE CONFERENCE 2010What is Filestorage?
• The default backend for Zope/ZEO
• var/ﬁlestorage/Data.fs
• Does an in-memory index at startup
• Data appends to the end
• Back-up utility is Repozo
Saturday, October 30, 2010

PLONE CONFERENCE 2010What is RelStorage?
• Drop in replacement
• Replaces ZEO
• Eliminates Data.fs
• Stores pickles
• Is still ZODB
• Uses relational
databases
Saturday, October 30, 2010

PLONE CONFERENCE 2010Why Change?
Saturday, October 30, 2010

PLONE CONFERENCE 2010Advantages of
RelStorage
• Existing infrastructure
• Existing expertise
• Wide range of management tools
• High availability, high performance clusters
• No in-memory index at startup
• Scales well as your database grows
• High Concurrency
Saturday, October 30, 2010

PLONE CONFERENCE 2010Real World
• Major Health System Site
• Java portion of site locked up
• Restarted Serivce with Little Impact
Saturday, October 30, 2010

PLONE CONFERENCE 2010Databases Supported
• MySQL 5.0.32 or better
• MySQLdb >= 1.2.2
• PostgreSQL 8.1 or
better
• psycopg2
• Oracle 10g
• cx_Oracle
Saturday, October 30, 2010

PLONE CONFERENCE 2010How Do I Install It?
• For MySQL add the
following to buildout.cfg:
eggs =
RelStorage
MySQL-Python
fake-eggs =
ZODB3 = 3.7.1
[instance]
type mysql
db plone
user plone
host localhost
password terriblepassword
Saturday, October 30, 2010

PLONE CONFERENCE 2010How Do I Install It?
• For PostgreSQL add the
following to buildout.cfg:
eggs =
RelStorage
fake-eggs =
ZODB3 = 3.7.1
psycopg2
[instance]
type postgresql
dbname plone
user plone
host localhost
password terriblepassword
Saturday, October 30, 2010

PLONE CONFERENCE 2010Options
• blob-dir
• shared-blob-dir
• keep-history
• replica-conf
• pack-gc
• pack-dry-run
• cache-servers
Saturday, October 30, 2010

PLONE CONFERENCE 2010Available Tools
• zodbconvert
• Converts from ﬁlestorage to {mysql/pgsql/oracle}
• Convert from {mysql/pgsql/oracle} to ﬁlestorage
• Convert from one Database to another
(ie: mysql to oracle)
• zodbpack
• Allows concurrent connections
• Use from cron
Saturday, October 30, 2010

PLONE CONFERENCE 2010zodbconvert.conf
<filestorage source>
path /opt/default/zinstance/var/
filestorage/Data.fs
</filestorage>
<relstorage destination>
<mysql>
db plone
user plone
passwd terriblepassword
</mysql>
</relstorage>
Converting from ﬁlestorage to MySQL
Saturday, October 30, 2010

PLONE CONFERENCE 2010Running zodbconvert
$ sudo /opt/mysql/zinstance/bin/zodbconvert --clear
zodbconvert.conf
Storages opened successfully.
All transactions copied successfully.
Saturday, October 30, 2010

PLONE CONFERENCE 2010What’s the Catch?
Saturday, October 30, 2010

PLONE CONFERENCE 2010There Are Pitfalls
• Added complexity
• Additional server load
• Additional memory utilization
• The database is full of pickles, not plain text
• Your database still needs to be packed
Saturday, October 30, 2010

PLONE CONFERENCE 2010What We Talked
About
• Zope storage engines: ZEO and RelStorage
• Why you might choose RelStorage
• How to install RelStorage
• Tools for RelStorage
• Why you might not use RelStorage
Saturday, October 30, 2010

PLONE CONFERENCE 2010Links
• http://pypi.python.org/pypi/RelStorage
• http://shane.willowrise.com/archives/relstorage-1-4-0b1-and-zodbshootout
Saturday, October 30, 2010

PLONE CONFERENCE 2010Credits:
• http://www.ﬂickr.com/photos/kaplanbr/
2465380377/
• http://www.ﬂickr.com/photos/
shuttercat7/416008944/
• http://www.ﬂickr.com/photos/juniorvelo/
3267647833/
• http://www.ﬂickr.com/photos/
arthurjohnpicton/4383221264/
• http://www.ﬂickr.com/photos/generated/
3249283352/
Saturday, October 30, 2010

Check out
sixfeetup.com/demos
Saturday, October 30, 2010

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Plone on RelStorage

1. Plone on RelStorage Calvin Hendryx-Parker PLONE CONFERENCE 2010 Saturday, October 30, 2010

2. PLONE CONFERENCE 2010Overview • How does Zope store data • Why RelStorage? • How to implement RelStorage • Some reasons not to use RelStorage Saturday, October 30, 2010

3. PLONE CONFERENCE 2010Zope Storage Methods Saturday, October 30, 2010

4. PLONE CONFERENCE 2010What is the ZODB? • Object oriented database • Used by Zope to hold everything from content to scripts, to service conﬁgurations Saturday, October 30, 2010

5. PLONE CONFERENCE 2010What is Filestorage? • The default backend for Zope/ZEO • var/ﬁlestorage/Data.fs • Does an in-memory index at startup • Data appends to the end • Back-up utility is Repozo Saturday, October 30, 2010

6. PLONE CONFERENCE 2010What is RelStorage? • Drop in replacement • Replaces ZEO • Eliminates Data.fs • Stores pickles • Is still ZODB • Uses relational databases Saturday, October 30, 2010

7. PLONE CONFERENCE 2010Why Change? Saturday, October 30, 2010

8. PLONE CONFERENCE 2010Advantages of RelStorage • Existing infrastructure • Existing expertise • Wide range of management tools • High availability, high performance clusters • No in-memory index at startup • Scales well as your database grows • High Concurrency Saturday, October 30, 2010

9. PLONE CONFERENCE 2010Real World • Major Health System Site • Java portion of site locked up • Restarted Serivce with Little Impact Saturday, October 30, 2010

10. PLONE CONFERENCE 2010Databases Supported • MySQL 5.0.32 or better • MySQLdb >= 1.2.2 • PostgreSQL 8.1 or better • psycopg2 • Oracle 10g • cx_Oracle Saturday, October 30, 2010

11. PLONE CONFERENCE 2010How Do I Install It? • For MySQL add the following to buildout.cfg: eggs = RelStorage MySQL-Python fake-eggs = ZODB3 = 3.7.1 [instance] type mysql db plone user plone host localhost password terriblepassword Saturday, October 30, 2010

12. PLONE CONFERENCE 2010How Do I Install It? • For PostgreSQL add the following to buildout.cfg: eggs = RelStorage fake-eggs = ZODB3 = 3.7.1 psycopg2 [instance] type postgresql dbname plone user plone host localhost password terriblepassword Saturday, October 30, 2010

13. PLONE CONFERENCE 2010Options • blob-dir • shared-blob-dir • keep-history • replica-conf • pack-gc • pack-dry-run • cache-servers Saturday, October 30, 2010

14. PLONE CONFERENCE 2010Available Tools • zodbconvert • Converts from ﬁlestorage to {mysql/pgsql/oracle} • Convert from {mysql/pgsql/oracle} to ﬁlestorage • Convert from one Database to another (ie: mysql to oracle) • zodbpack • Allows concurrent connections • Use from cron Saturday, October 30, 2010

15. PLONE CONFERENCE 2010zodbconvert.conf <filestorage source> path /opt/default/zinstance/var/ filestorage/Data.fs </filestorage> <relstorage destination> <mysql> db plone user plone passwd terriblepassword </mysql> </relstorage> Converting from ﬁlestorage to MySQL Saturday, October 30, 2010

16. PLONE CONFERENCE 2010Running zodbconvert $ sudo /opt/mysql/zinstance/bin/zodbconvert --clear zodbconvert.conf Storages opened successfully. All transactions copied successfully. Saturday, October 30, 2010

17. PLONE CONFERENCE 2010What’s the Catch? Saturday, October 30, 2010

18. PLONE CONFERENCE 2010There Are Pitfalls • Added complexity • Additional server load • Additional memory utilization • The database is full of pickles, not plain text • Your database still needs to be packed Saturday, October 30, 2010

19. PLONE CONFERENCE 2010What We Talked About • Zope storage engines: ZEO and RelStorage • Why you might choose RelStorage • How to install RelStorage • Tools for RelStorage • Why you might not use RelStorage Saturday, October 30, 2010

20. PLONE CONFERENCE 2010Links • http://pypi.python.org/pypi/RelStorage • http://shane.willowrise.com/archives/relstorage-1-4-0b1-and-zodbshootout Saturday, October 30, 2010

21. PLONE CONFERENCE 2010Credits: • http://www.flickr.com/photos/kaplanbr/ 2465380377/ • http://www.flickr.com/photos/ shuttercat7/416008944/ • http://www.flickr.com/photos/juniorvelo/ 3267647833/ • http://www.flickr.com/photos/ arthurjohnpicton/4383221264/ • http://www.flickr.com/photos/generated/ 3249283352/ Saturday, October 30, 2010

22. Check out sixfeetup.com/demos Saturday, October 30, 2010

Plone on RelStorage

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