Installation and Configuration

Prerequisites

The Amazon S3 Online Storage addon needs to be configured on your instance.

Amazon S3

Nuxeo Platform with Nuxeo Cold Storage addon requires a standard S3 bucket as for any other standard Nuxeo instance: this bucket is used to store the standard documents. You can refer to Amazon S3 Online Storage documentation to configure this bucket.

The s3:RestoreObject permission on this bucket is required to be able to restore document from Glacier storage class. See AWS documentation here.

Configuration

Make sure that all configuration values are set in the nuxeo.conf:

nuxeo.aws.accessKeyId=
nuxeo.aws.secretKey=
nuxeo.aws.region=
nuxeo.s3storage.bucket_prefix=
nuxeo.s3storage.bucket=

Optional but recommended: you can define the following property on the default blob provider of your deployment:

 <property name="coldStorage">true</property>

This property enforces a transactional behavior of the blob provider. It allows to rollback the change of the storage class in case an error occurred during the transaction in which documents were sent to cold storage.

There are some other optional configuration options:

To be able to send a document to cold storage, the addon requires by default that a preview is available that it can be used as a placeholder when browsing the document. This requirement can be disabled with the following configuration:

nuxeo.coldstorage.thumbnailPreviewRequired=false

A default placeholder will be displayed instead.

To customize the frequency in which the scheduler job checks if the retrieve task is finished and that the preview is available for the user to download, we use the expression below.

For example, if we want to check the status every hour at the 7th minute, we would add:

nuxeo.coldstorage.check.retrieve.state.cronExpression= 0 7 * ? * * *

You can learn more about Nuxeo schedulers in the related documentation page.

We can also customize how long we want to have the preview available once we do a retrieve action. The default is one day, but that can also be modified. For example, if we want it for 2 days we can add:

nuxeo.coldstorage.numberOfDaysOfAvailability.value.default= 2

Preview File Configuration

When a document is sent to cold storage, the main file is not available (it requires a retrieval operation, taking between 3 and 5 hours). In order to preserve the user experience, we display a rendition of the document (as renditions remain on S3 standard).

By default, we are using the following renditions:

You can change the renditions to be used and add new configurations for specific document type(s) and/or facet(s).

To do so, you can add an XML contribution to your Nuxeo Studio project and specify the renditions to use, as in the following example:

<require>org.nuxeo.coldstorage.rendition.contrib</require>
<extension target="org.nuxeo.coldstorage.service.ColdStorageService"  point="coldStorageRendition" >
  <coldStorageRendition name="defaultRendition" renditionName="thumbnail" />
  <coldStorageRendition name="pictureRendition" docType="Picture" facet="Picture" renditionName="Small" />
  <coldStorageRendition name="videoRendition" docType="Video" facet="Video" renditionName="MP4 480p" />
  <coldStorageRendition name="myCustomRendition" docType="myCustomDocumentType" facet="Picture" renditionName="OriginalJpeg" />  
</extension>