Vs RAC 1 TB of RAM

Dear Sir

We will be updating our mission critical system. Now, a question emerged, where should we go for CARS or single instance? It would be dataguard, maximum availability is not more in question. Now, what about performance? RAC offers many performance advantages, but the same performance again if we arrange server with 1 TB of RAM? Here are some doubts... Please share your opinions.

Kind regards

You will need to do tests of comparable reference, to decide what measures you will understand and use these initially your performance test.

ACR isn't a high availability, high performance. There are many other factors in the upgrade process.

By your existing system, there is rate of return on the increase in BMG, or the target memory in 11G or likely 12 c / who is your target?

You would also have to identify what makes regulation of upgrading by identifying existing bottlenecks.

If you're on 10G, you will also have to take into account the stability plan in a migration?

Also, what are the performance wise key pinch points that could be reduced as part of an upgrade.

If the seller is suggesting updated CARS as well as in the line, I would tend to ask what their experience is elsewhere / on other comparable sites they should have quite a few customers and a set of upgrade path / the experience of similar projects. It is always better to benchmarking against similar projects.

RAC is great, but present different challenges in terms of upgrades (rolling upgrades, scaling out the solution, use SCAN addresses or the use of load balancers) as well as the introduction of services to be balanced between the nodes, if DR must be the same number of nodes etc.

It is noted that RAC can relieve some performance issues by separating high dedicated nodes load processes, for example 3 node solution CARS with 2 nodes for a node dedicated for reporting & ELT to a data warehouse where you want resources or frontend with relatively granular queries applications manage loads on 3 servers / more CPU than loading everything on a single server / son. Depends on the architecture of the application and the needs of the company.

Tags: Database

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    Tracks 1 to 1:
    1: TRM_DATA_MODE1, 2048/0 x 00, FilePos 0 0 4686151680, ISRC ""
    Introduction DAO:
    ===========
    __Start_ | ___Track_ | _Idx_ | _CtrlAdr_ | _RecDep___ _
    0 | Lead-in | 0 | 0x41. 0x00
    0 | 1. 0 | 0x41. 0x00
    0 | 1. 1. 0x41. 0x00
    2288160 | Lead-out | 1. 0x41. 0x00

    15:18:56 #13 text 0 file SCSIPassThrough.cpp, line 36
    SPTILockVolume - completed successfully for FCTL_LOCK_VOLUME

    15:18:56 #14 phase 24 file dlgbrnst.cpp, line 1725
    Caching of files started

    15:18:56 #15 text 0 file Burncd.cpp, line 4132
    Cache writing successful.

    15:18:56 #16 phase 25 file dlgbrnst.cpp, line 1725
    Caching of files completed

    15:18:56 #17 phase 36 file dlgbrnst.cpp, line 1725
    Burn process started at 8 x (11 080 KB/s)

    15:18:56 #18 text 0 file ThreadedTransferInterface.cpp, line 2685
    Check position of the point disk 0 (relocatable, disc pos, no patch, orig to #0 info): write to #0

    15:18:56 #19 text 0 file Cdrdrv.cpp, line 8411
    -A DVD structure: physical Format information (00 h).
    Layer: 0, address: 0 (0 h), AGID: 0; Length: 2050
    Book type: DVD + R (10), part Version: 1.0 x (1)
    Disc size: 120 mm, maximum speed: (h F)
    Number of layers: 1, track path: path of the parallel runway (PTP), layer Type: recordable
    Linear mass: 0,267 um/bit, track density: 0.74 um/track
    Starting the number of physical sector of data area: 30000 h (DVD-ROM, DVD-R /-RW, DVD + R / + RW)
    End number of physical sector of data area: 26053F h
    End sector number in layer 0: 0 h (LBN: FFFD0000 h, 4193920 MB)
    There is no data in Burst cutting area (BCA)
    Disc Application code: 0 / 0 h
    Scope of Information indicators: 3 h
    Disc manufacturer ID: MBIPG101
    Media type ID: R04
    Product revision number: 1
    Number of bytes to use physical format information in ADIP up to byte 63:56
    Particular media [16.63]:
    00 00 03 4 42 49 50 47 - 31 30 31 52 30 34 01 38... MBIPG101R04.8
    23 54 37 12 02 42 6 02 - A8 6 B 15 15 0 B 0 B 08 08 #T7. BN... k...
    01-19-1 B 0C 0C 0C 0D 01 - 00 00 00 00 00 00 00 00...

    15:18:56 #20 text 0 file DVDPlusRW.cpp, line 666
    Begin to write his address to the LBA 0
    Mode high compatibility DVD: Yes

    15:20:47 #21 SPTI-1128 file SCSIPassThrough.cpp, line 323
    D: CdRom0: SCSIStatus (x 02) WinError (0) NeroError(-1128)
    Key: 0x03 (KEY_MEDIUM_ERROR)
    Printing Code: 0x11
    Meaning of Qual: 0x00
    The CDB data: 0x2A 00 00 00 03 00 00 00 20 00 00 00
    Sense area: 0xF1 00 03 00 00 00 00 0 a 00 00 00 00 11
    Buffer x05e50000: Len x 10000
    0 X 40 86 AB A0 6 B 93 01 4F 75 2 A 54 25 B7 F6 D3 E5
    0XA9 FC 97 DF 55 73 64 2 AA AF 96 7 D B8 4 C 7 C 66
    0XC1 9TH C1 FF FF 55 59 DB 08 65 CB 6 CA B9 0C HAS 2 B

    15:20:47 am #22 RDC-1128 file Writer.cpp, line 302
    Unrecoverable read error
    D: MAST * A DVD - RAM UJ-YEARS 840

    15:20:47 #23 text 0 file ThreadedTransfer.cpp, line 228
    all writers idle, stopping conversion

    15:20:54 #24 text 0 file ThreadedTransfer.cpp, line 222
    conversion idle, stopping reader

    15:20:57 #25 SPTI-1106 file SCSIPassThrough.cpp, line 323
    D: CdRom0: SCSIStatus (x 02) WinError (0) NeroError(-1106)
    Key: 0x03 (KEY_MEDIUM_ERROR)
    Detect Code: 0 x 73
    Meaning of Qual: 0x03
    The CDB data: 0x5B 01 01 00 00 01 00 00 00 00 00 00
    Sense area: 0 x 70 00 03 00 00 00 00 0 to 00 00 00 00 73 03

    15:20:57 #26 SPTI-1106 file SCSIPassThrough.cpp, line 323
    D: CdRom0: SCSIStatus (x 02) WinError (0) NeroError(-1106)
    Key: 0x03 (KEY_MEDIUM_ERROR)
    Detect Code: 0 x 73
    Meaning of Qual: 0x03
    The CDB data: 0x5B 01 05 00 00 00 00 00 00 00 00 00
    Sense area: 0 x 70 00 03 00 00 00 00 0 to 00 00 00 00 73 03

    15:20:57 #27 phase 127 file dlgbrnst.cpp, line 1725
    Generating borders high compatibility DVD

    15:20:57 #28 phase 129 file dlgbrnst.cpp, line 1725
    Production DVD borders completed successfully

    15:20:57 #29 phase 38 file dlgbrnst.cpp, line 1725
    Burn process failed at 8 x (11 080 KB/s)

    Existing drivers:
    File ' Drivers\CDRALW2K. SYS: Ver = 6.2.0.132, size = 24698 bytes, created 23/10/2003 04:15:02
    File ' Drivers\PXHELP20. SYS: Ver = 2.03.28a, size = 20640 bytes, created 05/31/2005 23:36:01 (Prassi/Veritas driver for win 2 K)

    Registry keys:
    HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\AllocateCDROMs: 0 (Security Option)

    Hello

    I can't find any strange or mysterious messages in the log file.
    You suggested that the drive can burn CDs but not DVDs.
    The calibration lens dysfunction is sometimes responsible for these issues.
    Unfortunately, I have no solution for this problem. The replacement drive must resolve.
    The unit is fairly new in this case, you should ask for help ASP.

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