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February 16th, 2014 23:00

Few Interview question - need answers.

1. What is the top most object type ?

My answer was dm_sysobject but the interviewer expected some other answer. Need help in this.

2. r_object_id - under which object type does it come? How and where it generated?

i explained r_object_id concept but the interviewer was specific abt its generation and its location of object type.

3.DQL to list active concurrent session?

Execute show_session was my answer. But the expectation was more.

4. Where does Documentum store cache files?

i didnt have answer.

449 Posts

February 18th, 2014 01:00

1. What is the top most object type ?

 

None.

2. r_object_id - under which object type does it come? How and where it generated?

Typically, object ids are generated by client (i.e. DFC) using following scenario:

  • client sends NEXT_ID or NEXT_ID_LIST RPC command to CS to get next unique id or pool of ids for specific type tag
  • current counters of available ids are stored in dmi_sequence_s table (see also  Maximum no of objects supported in a docbase....)
  • during save RPC CS typically registers id in dmi_object_type table ("typically" means that CS does not register ids for some types, e.g. dmi_queue_item, dmi_workitem, etc, for such ids it determines object type by type tag)

 

4. Where does Documentum store cache files?

 

Content Server stores some cache of objects in memory, but does not use filesystem at all.

26 Posts

February 17th, 2014 14:00

1. What is the top most object type ?

dm_persistent object, it has attribute of i_vstamp and r_object_id

2. r_object_id - under which object type does it come? How and where it generated?

it is inherited from dm_persistent object type. It is generated by internal jobs runs on content server. it is useful to identify the 09XXXXXX- 09 represent type of document and other value represent unique id for repository where document stored

3.DQL to list active concurrent session?

All i can find out is

Execute COUNT_SESSIONS

returns hot_list_size, warm_list_size and cold_list_size and etc.

hot_list_size gives the active session count where as warm_list_size gives the timed out sessions count and cold_list_size gives free session count.

4. Where does Documentum store cache files?

Document has space on the client machine where web server for application runs.

you find out in Documentum/Shared/Cache

Where it keeps business objects BOF and other cache in it.

February 17th, 2014 22:00

Thanks Anand.  But i couldnt find any object type named dm_persistent. Need help with some reference article. Lot of materials insists as dm_sysobject type as Object type.

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