The document discusses Apache Jackrabbit Oak, an open source content repository that can scale to the cloud. It provides an overview of content, repositories, scaling techniques using different storage backends like TarMK and MongoMK, and how Oak can be deployed in the cloud using technologies like S3 and MongoDB. The presentation covers key JCR concepts and shows how Oak can be used for applications like content management, digital asset management, and invoice management.

1. http://robert.muntea.nu @rombert
Apache Jackrabbit Oak – Scale your content repository to the cloud
Apache Jackrabbit Oak
Scale your content repository to the cloud
Robert Munteanu
http://robert.muntea.nu

2. http://robert.muntea.nu @rombert
Who I am

$DAYJOB

Adobe Experience
Manager
− Apache Sling
− Apache Jackrabbit
− Apache Felix

FOSS

MantisBT

Mylyn Connector for
MantisBT

Mylyn Connector for Review
Board

Apache Sling

3. http://robert.muntea.nu @rombert
Before we begin - some key terms
●
JCR
●
Apache Jackrabbit
●
Apache Jackrabbit Oak

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Agenda
●
Content
●
Repository
●
Scale
●
Cloud

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Content – What is content?

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Content – Node type defintions
[nt:resource] > mix:referenceable
- jcr:encoding
- jcr:mimeType mandatory
- jcr:data (binary) mandatory
- jcr:lastModified (date) mandatory ignore
[nt:unstructured] orderable
- * (UNDEFINED)
- * (UNDEFINED) multiple
+ * = nt:unstructured multiple VERSION

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Content - Hierarchy
blog
hello-world
images
jcr:content
some-cat.jpg
other-cat.jpg
media
cats-singing.ogg

8. http://robert.muntea.nu @rombert
Content - Properties
some-cat.jpg
- jcr:primaryType = app:asset
- jcr:title = Some Cat
- jcr:description = A longer description of this picture
of a cat
- jcr:created = 2014-06-03T00:00:00.000+02:00
- jcr:lastUpdated = 2014-06-03T11:00:00.000+02:00
- tags = [Animal, Cat, Color]
- width = 400
- height = 600

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Repository – the Content Repository Api for Java

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Repository – who implements the JCR standard

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Repository – who interfaces with JCR

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Repository – Apache Jackrabbit Oak
●
Open Source implementation of JCR
●
Developed under the Jackrabbit umbrella
●
Not “only” fast, but built to scale from the
ground up
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Aims to be a successor of Jackrabbit in a later
version
●
#7 most active project in the ASF, according to
Ohloh

13. http://robert.muntea.nu @rombert
Repository – Digital Asset Management Sample
images
some-cat.jpg
renditions
small.jpg
annotations
initial-review
Uploaded by author
Event-based generation
Restricted by ACLs
ripple.jpg

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Repository – storing configurations
etc
rendition
ripple
- orientation = /etc/rendition/ripple/options↵
/vertical
- antialiasing = true
- edges = /etc/rendition/ripple/options/wrap
- wave type = /etc/rendition/ripple/options/↵
wave_type
- period = 20
- amplitude = 5
- phase shift = 0

15. http://robert.muntea.nu @rombert
Repository – Adding Apache Sling to the mix
images
some-cat.jpg
renditions
small.jpg
annotations
initial-review
http://oak/images/some-cat.jpg
http://oak/images/some-cat.pdf
http://oak/images/some-cat/renditions.zip
http://oak/images/some-cat/annotations.odt
ripple.jpg

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Repository – Invoice Management Sample
invoices
$BIGCLIENT
2014
ABC-00014
original.pdf
renditions
jcr:content
Access restricted by ACLs
Used for previews
Changes denied by ACLs

17. http://robert.muntea.nu @rombert
Repository – Content Management Sample
par_2_with_image
- jcr:description = “Lorem
ipsum...”
- image =
/content/images/cats/tabby.jpg
blog
hello-world
jcr:content
heading_1
par_1
par_2_with_image
par_3

18. http://robert.muntea.nu @rombert
Scaling – Oak topologies
TarMK
●
Standalone
●
Fast
●
Easy to maintain
●
Supports failover
●
No horizontal scalability
MongoMK
●
Horizontally scales for read
and write access
●
Supports failover
●
Not as fast as TarMK

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Scaling – MongoMK standalone
Oak Server 1
Mongo Primary
Oak Server 2 Oak Server 3
Read
and
w
rite
Readandwrite
Read
and
write

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Scaling – MongoMK replica sets
Mongo Primary
Oak Server 1
Readandwrite
Oak Server 2
Mongo Secondary
Oak Server 3
Read
Read
Write
Mongo Primary
Readandwrite
W
rite
Mongo Secondary

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Scaling – MongoMK Sharding
Oak Server 1
+ mongos
Mongo Primary
Oak Server 2
+ mongos
Readandwrite
Readandwrite
Oak Server 3
+ mongos
Mongo Shard Primary
Oak Server 4
+ mongos
Readandwrite
Readandwrite
Mongo Shard Primary
Readandwrite
Readandwrite

22. http://robert.muntea.nu @rombert
Scaling – BlobStore implementations
●
FileBlobStore
●
MongoBlobStore
●
S3DataStore
●
FileDataStore
●
CloudBlobStore ( experimental )
●
MongoGridFSBlobStore ( experimental )

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Cloud
●
Blob storage
●
S3DataStore
●
CloudBlobStore ( experimental )
●
Node storage
●
MongoMK
●
DevOps friendliness
●
Easy deployment with oak-run or Apache Sling

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Wrapping up
●
Content
●
Repository
●
Scale
●
Cloud

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Resources
●
https://jackrabbit.apache.org/oak
●
https://jackrabbit.apache.org/
●
https://sling.apache.org/

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Credits
●
Icons courtesy of the Tango Icon Library -
http://tango.freedesktop.org/Tango_Icon_Library
●
Images courtesy of http://www.freedigitalphotos.net