Multiple storage on zope/Zeo

Zope/Zeo can have multiple storage mounted at anytime. Be default, zope already have two storages mounted ootb (w version 2.7.x); main and temporary_folder. Here's how to add more storage.

Mounting multiple storage in Zope:

Follow through these steps:

• open instancehome/etc/zope.conf
• find zodb_db declaration. by default there's one:

    <zodb_db main>
        Main FileStorage database
       <filestorage>
         path $INSTANCE/var/Data.fs
       </filestorage>
       mount-point /
    </zodb_db>
  

add another declaration, specify another and change the filename:

  <zodb_db anotherdb>
      Main FileStorage database
     <filestorage>  #we have a storage of type filestorage
       path $INSTANCE/var/Anotherdb.fs  #path to our new storage
     </filestorage>
     mount-point /somewhere #where it will be mounted 
  </zodb_db>

• now open zmi, and add somewhere, and voile, we have another storage mounted.

note: there used to be other type of storages - BerkeleyStorage, OracleStorage, etc. I haven't yet worked with these other implementation, so can;t say much. IIRC, BerkeleyStorage is no longer maintained.

Mounting multiple storage in Zeo:

Almost the same steps are needed. The difference is that some changes are done in zeo.conf::

• open instancehome/etc/zeo.conf
• by default, there's a declaration for the main storage (do this on the zeo server):

    <filestorage 1>
      path $INSTANCE/var/Data.fs
    </filestorage>
  

• add another one:

    <filestorage servis>
      path $INSTANCE/var/Anotherdb.fs
    </filestorage>
  

• edit instancehome/etc/zope.conf (at all zeo clients):

    <zodb_db main>
       mount-point /
       <zeoclient>
         server 10.1.1.2:9999
         storage 1
         name zeostorage
         var $INSTANCE/var
       </zeoclient>
     </zodb_db>
  
    <zodb_db svcs>
       mount-point /somewhere  #out mount point in zmi
       <zeoclient>
         server 10.1.1.2:9999   #where the storage is served (our ZSS)
         storage Anotherdb   #our storage name
         name zeostorageservis
         var $INSTANCE/var
       </zeoclient>
     </zodb_db>
  

we're done. notice that with zeo, we can actually have many zeo servers, and zeo clients can actually mount any storage.