Freelists parameter in storage definitions Designer 6.0

I have changed the freelists parameter in the storage parametrs. The table schema definition and implementation point to the correct storage parameters, however when I generate the schema, the freelists options are not included, is this a known bug? or do I have to setup something else?
Please can somebody help?
Regards.
Jesmond
null

Hi Demet,
Having read your question again I suspect that you are not asking about installation of database but about block sizes for table creation.
You can set those types of properties using the DB Admin tab in the Design Editor. Go to your database -> Users -> Schema Objects -> Table Implementations and double click on the table in question
Rgds
Susan

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Revision: 13051
Revision: 13051
Author:   [email protected]
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Hi,
We are using Designer 6.0 to generate our tablespace and table DML. I am currently trying to get Designer to generate a CREATE TABLE command of the form (where the FREELIST GROUP clause is the subject of this question).
CREATE TABLE
test_table( id NUMBER )
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DROP TABLE t;
create table t as select * from all_objects where 1=0;
begin
dbms_metadata.set_transform_param( DBMS_METADATA.SESSION_TRANSFORM, 'SEGMENT_ATTRIBUTES', false );
dbms_metadata.set_transform_param( DBMS_METADATA.SESSION_TRANSFORM, 'SQLTERMINATOR', TRUE );
end;
SELECT REPLACE(
DBMS_METADATA.GET_DDL( 'TABLE', 'T'),
'"'||USER||'".',
from dual;
CREATE TABLE "T"
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'"'||USER||'".',
OBJECT_SCRIPT
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Hi.
I've been trying to figure out if I can build a SOFS-cluster with 4 nodes and 4 JBOD cabinets per node for a total of 16 cabinets, like this:
I haven't seen this design though so I'm not sure if it's even possible and if it is, what features do I lose (enclosure awareness, etc)?
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Yeah, I was in a hurry when I posted my initial question and didn't explain my thought process clearly enough.
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this particular forum you'll see this question asked many times but not answered (we also did ask). If you'd manage to do this and share some information how I'd appreciate this as we;re still interested. See:
SoFS Scaling
http://social.technet.microsoft.com/Forums/windowsserver/en-US/20e0e320-ee90-4edf-a6df-4f91b1ef8531/scaling-the-cluster-2012-r2
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http://social.technet.microsoft.com/Forums/windowsserver/en-US/dc0213da-5ba1-4fad-a5e4-091e047f06b9/clustered-storage-spaces-architecture
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In this specific example, I started by building up an at-scale Spaces deployment - comprising of "units" of 2-4 servers, attached to 4 SAS JBODs, for a total of 240 disks. As scaling beyond those 240 disks with the 2-4 existing servers would become impractical
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These additional units would further comprise of servers and JBODs, but the underlying storage connectivity (Shared SAS) exists only between servers and JBODs within individual units. This means that each unit would have it's own storage pool,
and it's own collection of provisioned virtual disks. Resiliency of data and creation of virtual disks occurs within each unit.
As there can be multiple units with no physical SAS connectivity between them, Ethernet connectivity between all the cluster nodes and cluster shared volumes (CSV) presents the means to unify the data access namespace between all the cluster nodes regardless
of physical connectivity at the underlying storage level - making the logical storage architecture from a client and cluster point of view completely flat, regardless of how it's actually physically organized. Further, as you are using scale-out file server
atop of CSV (with R2 and SMB 3.0) client connections to the file server cluster will automatically connect to the correct cluster nodes which are attached to the clients’ data.
Data availability and resiliency occurs at the unit level, and these can be extended across units through a workload replication mechanism such as Hyper-V replica, or data replication mechanisms such as DFSR.
I hope this helps clear up any confusion on the above, and let me know if you have any further questions!
Bryan"
2) Sure there's no point as single node cluster is not fault tolerant which compromises a bit whole idea of having a cluster :) Consensus!
3) Idea is nice except I don't know how to implement it w/o third-party software *or* SAS switches limiting bandwidth, and increasing cost and complexity :(
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

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Just taking a guess here (being that I've never seen this happen before)...
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Oracle Table Storage Parameters - a nice reading

bold Gony's reading excercise for 07/09/2009 bold -
The below is from the web source http://www.praetoriate.com/t_%20tuning_storage_parameters.htm. Very good material.The notes refers to figures and diagrams which cannot be seen below. But the text below is ver useful.
Let’s begin this chapter by introducing the relationship between object storage parameters and performance. Poor object performance within Oracle is experienced in several areas:
Slow inserts Insert operations run slowly and have excessive I/O. This happens when blocks on the freelist only have room for a few rows before Oracle is forced to grab another free block.
Slow selects Select statements have excessive I/O because of chained rows. This occurs when rows “chain” and fragment onto several data blocks, causing additional I/O to fetch the blocks.
Slow updates Update statements run very slowly with double the amount of I/O. This happens when update operations expand a VARCHAR or BLOB column and Oracle is forced to chain the row contents onto additional data blocks.
Slow deletes Large delete statements can run slowly and cause segment header contention. This happens when rows are deleted and Oracle must relink the data block onto the freelist for the table.
As we see, the storage parameters for Oracle tables and indexes can have an important effect on the performance of the database. Let’s begin our discussion of object tuning by reviewing the common storage parameters that affect Oracle performance.
The pctfree Storage Parameter
The purpose of pctfree is to tell Oracle when to remove a block from the object’s freelist. Since the Oracle default is pctfree=10, blocks remain on the freelist while they are less than 90 percent full. As shown in Figure 10-5, once an insert makes the block grow beyond 90 percent full, it is removed from the freelist, leaving 10 percent of the block for row expansion. Furthermore, the data block will remain off the freelist even after the space drops below 90 percent. Only after subsequent delete operations cause the space to fall below the pctused threshold of 40 percent will Oracle put the block back onto the freelist.
Figure 10-83: The pctfree threshold
The pctused Storage Parameter
The pctused parameter tells Oracle when to add a previously full block onto the freelist. As rows are deleted from a table, the database blocks become eligible to accept new rows. This happens when the amount of space in a database block falls below pctused, and a freelist relink operation is triggered, as shown in Figure 10-6.
Figure 10-84: The pctused threshold
For example, with pctused=60, all database blocks that have less than 60 percent will be on the freelist, as well as other blocks that dropped below pctused and have not yet grown to pctfree. Once a block deletes a row and becomes less than 60 percent full, the block goes back on the freelist. When rows are deleted, data blocks become available when a block’s free space drops below the value of pctused for the table, and Oracle relinks the data block onto the freelist chain. As the table has rows inserted into it, it will grow until the space on the block exceeds the threshold pctfree, at which time the block is unlinked from the freelist.
The freelists Storage Parameter
The freelists parameter tells Oracle how many segment header blocks to create for a table or index. Multiple freelists are used to prevent segment header contention when several tasks compete to INSERT, UPDATE, or DELETE from the table. The freelists parameter should be set to the maximum number of concurrent update operations.
Prior to Oracle8i, you must reorganize the table to change the freelists storage parameter. In Oracle8i, you can dynamically add freelists to any table or index with the alter table command. In Oracle8i, adding a freelist reserves a new block in the table to hold the control structures. To use this feature, you must set the compatible parameter to 8.1.6 or greater.
The freelist groups Storage Parameter for OPS
The freelist groups parameter is used in Oracle Parallel Server (Real Application Clusters). When multiple instances access a table, separate freelist groups are allocated in the segment header. The freelist groups parameter should be set the number of instances that access the table. For details on segment internals with multiple freelist groups, see Chapter 13.
NOTE: The variables are called pctfree and pctused in the create table and alter table syntax, but they are called PCT_FREE and PCT_USED in the dba_tables view in the Oracle dictionary. The programmer responsible for this mix-up was promoted to senior vice president in recognition of his contribution to the complexity of the Oracle software.
Summary of Storage Parameter Rules
The following rules govern the settings for the storage parameters freelists, freelist groups, pctfree, and pctused. As you know, the value of pctused and pctfree can easily be changed at any time with the alter table command, and the observant DBA should be able to develop a methodology for deciding the optimal settings for these parameters. For now, accept these rules, and we will be discussing them in detail later in this chapter.
There is a direct trade-off between effective space utilization and high performance, and the table storage parameters control this trade-off:
For efficient space reuse A high value for pctused will effectively reuse space on data blocks, but at the expense of additional I/O. A high pctused means that relatively full blocks are placed on the freelist. Hence, these blocks will be able to accept only a few rows before becoming full again, leading to more I/O.
For high performance A low value for pctused means that Oracle will not place a data block onto the freelist until it is nearly empty. The block will be able to accept many rows until it becomes full, thereby reducing I/O at insert time. Remember that it is always faster for Oracle to extend into new blocks than to reuse existing blocks. It takes fewer resources for Oracle to extend a table than to manage freelists.
While we will go into the justification for these rules later in this chapter, let’s review the general guidelines for setting of object storage parameters:
Always set pctused to allow enough room to accept a new row. We never want to have a free block that does not have enough room to accept a row. If we do, this will cause a slowdown since Oracle will attempt to read five “dead” free blocks before extending the table to get an empty block.
The presence of chained rows in a table means that pctfree is too low or that db_block_size is too small. In most cases within Oracle, RAW and LONG RAW columns make huge rows that exceed the maximum block size for Oracle, making chained rows unavoidable.
If a table has simultaneous insert SQL processes, it needs to have simultaneous delete processes. Running a single purge job will place all of the free blocks on only one freelist, and none of the other freelists will contain any free blocks from the purge.
The freelist parameter should be set to the high-water mark of updates to a table. For example, if the customer table has up to 20 end users performing insert operations at any time, the customer table should have freelists=20.
The freelist groups parameter should be set the number of Real Application Clusters instances (Oracle Parallel Server in Oracle8i) that access the table.

sb92075 wrote:
goni ,
Please let go of 20th century & join the rest or the world in the 21st century.
Information presented is obsoleted & can be ignored when using ASSM & ASSM is default with V10 & V11I said the same over here for the exactly same thread, not sure what the heck OP is upto?
Oracle Table Storage Parameters - a nice reading
regards
Aman....

Freelists parameter in storage definitions Designer 6.0

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