Seeking advice on Best Practices for XML Storage Options - XMLTYPE

Sparc64
11.2.0.2
During OOW12 I tried to attend every xml session I could. There was one where a Mr. Drake was explaining something about not using clob
as an attribute to storing the xml and that "it will break your application."
We're moving forward with storing the industry standard invoice in an xmltype column, but Im not concerned that our table definition is not what was advised:
--i've dummied this down to protect company assets
CREATE TABLE "INVOICE_DOC"
   (     "INVOICE_ID" NUMBER NOT NULL ENABLE,
     "DOC" "SYS"."XMLTYPE" NOT NULL ENABLE,
     "VERSION" VARCHAR2(256) NOT NULL ENABLE,
     "STATUS" VARCHAR2(256),
     "STATE" VARCHAR2(256),
     "USER_ID" VARCHAR2(256),
     "APP_ID" VARCHAR2(256),
     "INSERT_TS" TIMESTAMP (6) WITH LOCAL TIME ZONE,
     "UPDATE_TS" TIMESTAMP (6) WITH LOCAL TIME ZONE,
      CONSTRAINT "FK_####_DOC_INV_ID" FOREIGN KEY ("INVOICE_ID")
             REFERENCES "INVOICE_LO" ("INVOICE_ID") ENABLE
   ) SEGMENT CREATION IMMEDIATE
INITRANS 20
TABLESPACE "####_####_DATA"
       XMLTYPE COLUMN "DOC" STORE AS BASICFILE CLOB (
TABLESPACE "####_####_DATA" XMLTYPE COLUMN "DOC" STORE AS BASICFILE CLOB (
TABLESPACE "####_####_DATA" ENABLE STORAGE IN ROW CHUNK 16384 RETENTION
NOCACHE LOGGING
STORAGE(INITIAL 81920 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT))
XMLSCHEMA "http://mycompanynamehere.com/xdb/Invoice###.xsd" ELEMENT "Invoice" ID #####"
{code}
What is a best practice for this type of table? Yes, we intend on registering the schema against an xsd.
Any help/advice would be appreciated.
-abe

Hi,
I suggest you read this paper : Oracle XML DB : Choosing the Best XMLType Storage Option for Your Use Case
It is available on the XML DB home page along with other documents you may be interested in.
To sum up, the storage method you need depends on the requirement, i.e. how XML data is accessed.
There was one where a Mr. Drake was explaining something about not using clob as an attribute to storing the xml and that "it will break your application."I think the message Mark Drake wanted to convey is that CLOB storage is now deprecated and shouldn't be used anymore (though still supported for backward compatibility).
The default XMLType storage starting with version 11.2.0.2 is now Binary XML, a posted-parsed binary format that optimizes both storage size and data access (via XQuery), so you should at least use it instead of the BASICFILE CLOB.
Schema-based Binary XML is also available, it adds another layer of "awareness" for Oracle to manage instance documents.
To use this feature, the XML schema must be registered with "options => dbms_xmlschema.REGISTER_BINARYXML".
The other common approach for schema-based XML is Object-Relational storage.
BTW... you may want to post here next time, in the dedicated forum : {forum:id=34}
Mark Drake is one of the regular user, along with Marco Gralike you've probably seen too at OOW.
Edited by: odie_63 on 18 oct. 2012 21:55

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You're welcome.
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What is the guideline and/or best practice for EMC setup on ASM?

We are going to use EMC CX4-480 for ASM storage on RAC. What is the guideline and best practice for EMC setup on ASM?
Thanks for the advice!

Probably a poor choice of words. Sorry.
So basically, I have gotten further, but I just noticed related problem.
I'm using the WebServices(WS) 1.0. I insert an account, then, on a separate WS call, I insert my contacts for the account. I include the AccountID, and a user defined key from the Account when creating the Contact.
When I look at my Contact on the CRMOD web page, it shows the appropriate links back to the Account. But when I look at my Account on the CRMOD web page, it shows no Contacts.
So when I say workflow or Best Practice, I was hoping for guidance on how to properly write my code to accomplish all of the necessary steps. As in this is how you insert an account with a contact(s) and it updates the appropriate IDs so that it shows up properly on the CRMOD web pages.
Based on the above, it looks like I need to, as the next step, take the ContactID and update the Account with it so that their is a bi-directional link.
I'm thinking there is a better way in doing this.
Here is my psuedocode:
AccountInsert()
AccountID = NewAcctRec
ContactInsert(NewAcctRec)
ContactID = NewContRec
AccountUpdate(NewContRec)
Thanks,

Best-practice for Catalog Views ? :|

Hello community,
A best practice question:
The situtation: I have several product categories (110), several items in those categories (4000) and 300 end-users. I would like to know which is the best practice for segment the catalog. I mean, some users should only see categories 10,20 & 30. Other users only category 80, etc. The problem is how can I implement this ?
My first idea is:
1. Create 110 Procurement Catalogs (1 for every prod.category). Each catalog should contain only its product category.
2. Assign in my Org Model, in a user-level all the "catalogs" that the user should access.
Do you have any idea in order to improve this ?
Saludos desde Mexico,
Diego

Hi,
Your way of doing will work, but you'll get maintenance issues (to many catalogs, and catalog link to maintain for each user).
The other way is to built your views in CCM, and assign these views to the users, either on the roles (PFCG) or on the user (SU01). The problem is that with CCM 1.0 this is limitated, cause you'll have to assign one by one the items to each view (no dynamic or mass processes), it has been enhanced in CCM 2.0.
My advice:
-Challenge your customer about views, and try to limit the number of views, with for example strategic and non strategic
-With CCM 1.0 stick to the procurement catalogs, or implement BADIs to assign items to the views (I experienced it, it works, but is quite difficult), but with a limitated number of views
Good luck.
Vadim

Networking "best practice" for setting up a farm

Hi all.
We would like to set an OracleVM farm, and I have a question about "best practice" for
configuring the network. Some background:
- The hardware I have is comprised of machines with 4 gig-eth NICs each.
- The storage will be coming primarily from a backend NAS appliance (Netapp, FWIW).
- We have already allocated a separate VLAN for management.
- We would like to have HA capable VMs using OCFS2 (on top of NFS.)
I'm trying to decide between 2 possible configurations. The first would keep physical separation
between the mgt/storage networks and the DomU networks. The second would just trunk
everything together across all 4 NICs, something like:
Config 1:
- eth0 - management/cluster-interconnect
- eth1 - storage
- eth2/eth3 => bond0 - 8021q trunked, bonded interfaces for DomUs
Config 2:
- eth0/1/2/3 => bond0
Do people have experience or recommendation about the best configuration?
I'm attracted to the first option (perhaps naively) because CI/storage would benefit
from dedicated bandwidth and this configuration might also be more secure.
Regards,
Robert.

user1070509 wrote:
Option #4 (802.3ad) looks promising, but I don't know if this can be made to work across
separate switches.It can, if your switches support cross-switch trunking. Essentially, 802.3ad (also known as LACP or EtherChannel on Cisco devices) requires your switch to be properly configured to allow trunking across the interfaces used for the bond. I know that the high-end Cisco and Juniper switches do support LACP across multiple switches. In the Cisco world, this is called MEC (Multichassis EtherChannel).
If you're using low-end commodity-grade gear, you'll probably need to use active/passive bonds if you want to span switches. Alternatively, you could use one of the balance algorithms for some bandwitch increase. You'd have to run your own testing to determine which algorithm is best suited for your workload.
The Linux Foundation's Net:Bonding article has some great information on bonding in general, particularly on the various bonding methods for high availability:
http://www.linuxfoundation.org/en/Net:Bonding

Seeking advice on Best Practices for XML Storage Options - XMLTYPE

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