WDA-Flash Data transfer Frequency

Hi
I have some WDA program with Flash Island inside.  I share some objects (tables) from WDA to Flash, and Flash make graphics.
So i have in WDA conext the requiered nodes (for each table) wich i fill in WDA and share it to Flash.
My doubt is about Data transfer frequency between WDA and Flash:
If i change a node content, ie. i fill the node again with the new table content, this node is shared automatically with Flash, thats good when i change all records from that node (table).
1. If i have a NODE_A with 100 records ,  if i only change the content for one specific record , does
all the node content (all 100 records) are transfered to Flash ?   I guess yes.
2. But if i have NODE_A (100 records) and i have other NODE_B  (150 records) and i change the NODE_A content  ; does NODE_B content are transfered also to Flash even this node has not changes ?
3. Suppose i have other Node (not table) with attribute to enter Date wich is shared to Flash ,  if i change that Date ,   does the nodes NODE_A and NODE_B  are also transfered to Flash even these have not changes  ?
4. If i do not make any change to nodes shared with Flash , when i make any event (press match code) or change some node or attribute wich are not shared to Flash   ;  does nodes NODE_A and NODE_B and Node Date are transfered also to Flash ?
I know these are several questions, i need to know about this because if the nodes are transfered alwasy and with all node content transfered,  then i will need to have minimum data in that nodes shared to WDA and even i will need to clear/refresh  (object->invalidate) that nodes when Flash receives the data, this in order to have good performance and server work for the application.
Does somebody can give me some 'light' about this please ?
Best Regards
Frank

Hi Frank,
From my past experience with FlashIslands, what i understood is:
The context data is transferred from WDA to Flash whenever there is a change in any of the context nodes shared with Flash.
And when ever there is an event fired from Flash to WDA.
please find the answers for your questions below:
1. Yes all the node content will be transferred. Actually not only this node where you have made the change, but also all the nodes data which are shared with Flash will be transferred.
2. Yes. please see point 1.
3. Yes
4. As far as i know, No. As the change is in the content of a node which is not shared with Flash, there wont be any data transfer from WDA to Flash.
I hope this is clear!
Best Regards,
Srilatha

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    Handle 0x0802, DMI type 126, 9 bytes
    Inactive
    Handle 0x0803, DMI type 126, 9 bytes
    Inactive
    Handle 0x0804, DMI type 126, 9 bytes
    Inactive
    Handle 0x0805, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB1
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x0806, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB2
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x0807, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB3
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x0808, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB4
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x0809, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB5
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x080A, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB6
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x080B, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB7
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x080C, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: USB8
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Access Bus (USB)
    Port Type: USB
    Handle 0x080D, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: ENET
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: RJ-45
    Port Type: Network Port
    Handle 0x080E, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: MIC
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port
    Handle 0x080F, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: LINE-OUT
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port
    Handle 0x0810, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: LINE-IN
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port
    Handle 0x0811, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: HP-OUT
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port
    Handle 0x0812, DMI type 8, 9 bytes
    Port Connector Information
    Internal Reference Designator: MONITOR
    Internal Connector Type: None
    External Reference Designator: Not Specified
    External Connector Type: DB-15 female
    Port Type: Video Port
    Handle 0x090A, DMI type 9, 13 bytes
    System Slot Information
    Designation: SLOT1
    Type: x1 Proprietary
    Current Usage: In Use
    Length: Long
    Characteristics:
    PME signal is supported
    Handle 0x0901, DMI type 126, 13 bytes
    Inactive
    Handle 0x0902, DMI type 9, 13 bytes
    System Slot Information
    Designation: SLOT2
    Type: 32-bit PCI
    Current Usage: Available
    Length: Long
    ID: 2
    Characteristics:
    5.0 V is provided
    3.3 V is provided
    PME signal is supported
    Handle 0x0903, DMI type 126, 13 bytes
    Inactive
    Handle 0x0904, DMI type 126, 13 bytes
    Inactive
    Handle 0x0905, DMI type 126, 13 bytes
    Inactive
    Handle 0x0906, DMI type 126, 13 bytes
    Inactive
    Handle 0x0907, DMI type 126, 13 bytes
    Inactive
    Handle 0x0908, DMI type 126, 13 bytes
    Inactive
    Handle 0x0A00, DMI type 10, 6 bytes
    On Board Device Information
    Type: Video
    Status: Disabled
    Description: Intel Graphics Media Accelerator 950
    Handle 0x0A02, DMI type 10, 6 bytes
    On Board Device Information
    Type: Ethernet
    Status: Enabled
    Description: Intel Gigabit Ethernet Controller
    Handle 0x0A03, DMI type 10, 6 bytes
    On Board Device Information
    Type: Sound
    Status: Enabled
    Description: Intel(R) High Definition Audio Controller
    Handle 0x0B00, DMI type 11, 5 bytes
    OEM Strings
    String 1: www.dell.com
    Handle 0x0D00, DMI type 13, 22 bytes
    BIOS Language Information
    Language Description Format: Long
    Installable Languages: 1
    en|US|iso8859-1
    Currently Installed Language: en|US|iso8859-1
    Handle 0x0F00, DMI type 15, 29 bytes
    System Event Log
    Area Length: 2049 bytes
    Header Start Offset: 0x0000
    Header Length: 16 bytes
    Data Start Offset: 0x0010
    Access Method: Memory-mapped physical 32-bit address
    Access Address: 0xFFF01000
    Status: Valid, Not Full
    Change Token: 0x00000018
    Header Format: Type 1
    Supported Log Type Descriptors: 3
    Descriptor 1: POST error
    Data Format 1: POST results bitmap
    Descriptor 2: System limit exceeded
    Data Format 2: System management
    Descriptor 3: Log area reset/cleared
    Data Format 3: None
    Handle 0x1000, DMI type 16, 15 bytes
    Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 8 GB
    Error Information Handle: Not Provided
    Number Of Devices: 4
    Handle 0x1100, DMI type 17, 27 bytes
    Memory Device
    Array Handle: 0x1000
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_1
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 667 MHz
    Manufacturer: AD00000000000000
    Handle 0x1101, DMI type 17, 27 bytes
    Memory Device
    Array Handle: 0x1000
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_3
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 667 MHz
    Handle 0x1102, DMI type 17, 27 bytes
    Memory Device
    Array Handle: 0x1000
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_2
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 667 MHz
    Handle 0x1103, DMI type 17, 27 bytes
    Memory Device
    Array Handle: 0x1000
    Error Information Handle: Not Provided
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 1024 MB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_4
    Bank Locator: Not Specified
    Type: DDR2
    Type Detail: Synchronous
    Speed: 667 MHz
    Handle 0x1300, DMI type 19, 15 bytes
    Memory Array Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x000FDFFFFFF
    Range Size: 4064 MB
    Physical Array Handle: 0x1000
    Partition Width: 1
    Handle 0x1400, DMI type 20, 19 bytes
    Memory Device Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x0007FFFFFFF
    Range Size: 2 GB
    Physical Device Handle: 0x1100
    Memory Array Mapped Address Handle: 0x1300
    Partition Row Position: 1
    Interleave Position: 1
    Interleaved Data Depth: 1
    Handle 0x1401, DMI type 20, 19 bytes
    Memory Device Mapped Address
    Starting Address: 0x00080000000
    Ending Address: 0x000FDFFFFFF
    Range Size: 2016 MB
    Physical Device Handle: 0x1101
    Memory Array Mapped Address Handle: 0x1300
    Partition Row Position: 1
    Interleave Position: 1
    Interleaved Data Depth: 1
    Handle 0x1402, DMI type 20, 19 bytes
    Memory Device Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x0007FFFFFFF
    Range Size: 2 GB
    Physical Device Handle: 0x1102
    Memory Array Mapped Address Handle: 0x1300
    Partition Row Position: 1
    Interleave Position: 2
    Interleaved Data Depth: 1
    Handle 0x1403, DMI type 20, 19 bytes
    Memory Device Mapped Address
    Starting Address: 0x00080000000
    Ending Address: 0x000FDFFFFFF
    Range Size: 2016 MB
    Physical Device Handle: 0x1103
    Memory Array Mapped Address Handle: 0x1300
    Partition Row Position: 1
    Interleave Position: 2
    Interleaved Data Depth: 1
    Handle 0x1410, DMI type 126, 19 bytes
    Inactive
    Handle 0x1800, DMI type 24, 5 bytes
    Hardware Security
    Power-On Password Status: Enabled
    Keyboard Password Status: Not Implemented
    Administrator Password Status: Enabled
    Front Panel Reset Status: Not Implemented
    Handle 0x1900, DMI type 25, 9 bytes
    System Power Controls
    Next Scheduled Power-on: *-* 00:00:00
    Handle 0x1B10, DMI type 27, 12 bytes
    Cooling Device
    Type: Fan
    Status: OK
    OEM-specific Information: 0x0000DD00
    Handle 0x1B11, DMI type 27, 12 bytes
    Cooling Device
    Type: Fan
    Status: OK
    OEM-specific Information: 0x0000DD01
    Handle 0x1B12, DMI type 126, 12 bytes
    Inactive
    Handle 0x1B13, DMI type 126, 12 bytes
    Inactive
    Handle 0x1B14, DMI type 126, 12 bytes
    Inactive
    Handle 0x2000, DMI type 32, 11 bytes
    System Boot Information
    Status: No errors detected
    Handle 0x8100, DMI type 129, 8 bytes
    OEM-specific Type
    Header and Data:
    81 08 00 81 01 01 02 01
    Strings:
    Intel_ASF
    Intel_ASF_001
    Handle 0x8200, DMI type 130, 20 bytes
    OEM-specific Type
    Header and Data:
    82 14 00 82 24 41 4D 54 01 01 00 00 01 A5 0B 02
    00 00 00 00
    Handle 0x8300, DMI type 131, 64 bytes
    OEM-specific Type
    Header and Data:
    83 40 00 83 14 00 00 00 00 00 C0 29 05 00 00 00
    F8 00 4E 24 00 00 00 00 0D 00 00 00 02 00 03 00
    19 04 14 00 01 00 01 02 C8 00 BD 10 00 00 00 00
    00 00 00 00 FF 00 00 00 00 00 00 00 00 00 00 00
    Handle 0x8800, DMI type 136, 6 bytes
    OEM-specific Type
    Header and Data:
    88 06 00 88 5A 5A
    Handle 0xD000, DMI type 208, 10 bytes
    OEM-specific Type
    Header and Data:
    D0 0A 00 D0 01 03 FE 00 11 02
    Handle 0xD100, DMI type 209, 12 bytes
    OEM-specific Type
    Header and Data:
    D1 0C 00 D1 78 03 07 03 04 0F 80 05
    Handle 0xD200, DMI type 210, 12 bytes
    OEM-specific Type
    Header and Data:
    D2 0C 00 D2 F8 03 04 03 06 80 04 05
    Handle 0xD201, DMI type 126, 12 bytes
    Inactive
    Handle 0xD400, DMI type 212, 242 bytes
    OEM-specific Type
    Header and Data:
    D4 F2 00 D4 70 00 71 00 00 10 2D 2E 42 00 11 FE
    01 43 00 11 FE 00 0F 00 25 FC 00 10 00 25 FC 01
    11 00 25 FC 02 12 00 25 FC 03 00 00 25 F3 00 00
    00 25 F3 04 00 00 25 F3 08 00 00 25 F3 0C 07 00
    23 8F 00 08 00 23 F3 00 09 00 23 F3 04 0A 00 23
    F3 08 0B 00 23 8F 10 0C 00 23 8F 20 0E 00 23 8F
    30 0D 00 23 8C 40 A6 00 23 8C 41 A7 00 23 8C 42
    05 01 22 FD 02 06 01 22 FD 00 8C 00 22 FE 00 8D
    00 22 FE 01 9B 00 25 3F 40 9C 00 25 3F 00 09 01
    25 3F 80 A1 00 26 F3 00 A2 00 26 F3 08 A3 00 26
    F3 04 9F 00 26 FD 02 A0 00 26 FD 00 9D 00 11 FB
    04 9E 00 11 FB 00 54 01 23 7F 00 55 01 23 7F 80
    5C 00 78 BF 40 5D 00 78 BF 00 04 80 78 F5 0A 01
    A0 78 F5 00 93 00 7B 7F 80 94 00 7B 7F 00 8A 00
    37 DF 20 8B 00 37 DF 00 03 C0 67 00 05 FF FF 00
    00 00
    Handle 0xD401, DMI type 212, 172 bytes
    OEM-specific Type
    Header and Data:
    D4 AC 01 D4 70 00 71 00 03 40 59 6D 2D 00 59 FC
    02 2E 00 59 FC 00 6E 00 59 FC 01 E0 01 59 FC 03
    28 00 59 3F 00 29 00 59 3F 40 2A 00 59 3F 80 2B
    00 5A 00 00 2C 00 5B 00 00 55 00 59 F3 00 6D 00
    59 F3 04 8E 00 59 F3 08 8F 00 59 F3 00 00 00 55
    FB 04 00 00 55 FB 00 23 00 55 7F 00 22 00 55 7F
    80 F5 00 58 BF 40 F6 00 58 BF 00 EB 00 55 FE 00
    EA 00 55 FE 01 40 01 54 EF 00 41 01 54 EF 10 ED
    00 54 F7 00 F0 00 54 F7 08 4A 01 53 DF 00 4B 01
    53 DF 20 4C 01 53 7F 00 4D 01 53 7F 80 68 01 56
    BF 00 69 01 56 BF 40 FF FF 00 00 00
    Handle 0xD402, DMI type 212, 152 bytes
    OEM-specific Type
    Header and Data:
    D4 98 02 D4 70 00 71 00 00 10 2D 2E 2D 01 21 FE
    01 2E 01 21 FE 00 97 00 22 FB 00 98 00 22 FB 04
    90 00 11 CF 00 91 00 11 CF 20 92 00 11 CF 10 E2
    00 27 7F 00 E3 00 27 7F 80 E4 00 27 BF 00 E5 00
    27 BF 40 D1 00 22 7F 80 D2 00 22 7F 00 45 01 22
    BF 40 44 01 22 BF 00 36 01 21 F1 06 37 01 21 F1
    02 38 01 21 F1 00 39 01 21 F1 04 2B 01 11 7F 80
    2C 01 11 7F 00 4E 01 65 CF 00 4F 01 65 CF 10 D4
    01 65 F3 00 D5 01 65 F3 04 D2 01 65 FC 00 D3 01
    65 FC 01 FF FF 00 00 00
    Handle 0xD403, DMI type 212, 157 bytes
    OEM-specific Type
    Header and Data:
    D4 9D 03 D4 70 00 71 00 03 40 59 6D 17 01 52 FE
    00 18 01 52 FE 01 19 01 52 FB 00 1A 01 52 FB 04
    1B 01 52 FD 00 1C 01 52 FD 02 1D 01 52 F7 00 1E
    01 52 F7 08 1F 01 52 EF 00 20 01 52 EF 10 21 01
    52 BF 00 22 01 52 BF 40 87 00 59 DF 20 88 00 59
    DF 00 E8 01 66 FD 00 E9 01 66 FD 02 02 02 53 BF
    00 03 02 53 BF 40 04 02 53 EF 00 05 02 53 EF 10
    06 02 66 DF 00 07 02 66 DF 20 08 02 66 EF 00 09
    02 66 EF 10 17 02 66 F7 00 18 02 66 F7 08 44 02
    52 BF 40 45 02 52 BF 00 FF FF 00 00 00
    Handle 0xD800, DMI type 126, 9 bytes
    Inactive
    Handle 0xDD00, DMI type 221, 19 bytes
    OEM-specific Type
    Header and Data:
    DD 13 00 DD 00 01 00 00 00 10 F5 00 00 00 00 00
    00 00 00
    Handle 0xDD01, DMI type 221, 19 bytes
    OEM-specific Type
    Header and Data:
    DD 13 01 DD 00 01 00 00 00 11 F5 00 00 00 00 00
    00 00 00
    Handle 0xDD02, DMI type 221, 19 bytes
    OEM-specific Type
    Header and Data:
    DD 13 02 DD 00 01 00 00 00 12 F5 00 00 00 00 00
    00 00 00
    Handle 0xDE00, DMI type 222, 16 bytes
    OEM-specific Type
    Header and Data:
    DE 10 00 DE C1 0B 00 00 10 05 19 21 01 00 00 01
    Handle 0x7F00, DMI type 127, 4 bytes
    End Of Table
    Hdparm also does not tell me the max data transfer rate (disk speed) of my current drive although this link : www.wdc.com/en/library/sata/2879-001146.pdf  says that it is 3.0Gb/s
    and here's hdparm -I /dev/sda
    /dev/sda:
    ATA device, with non-removable media
    Model Number: WDC WD800JD-75JNC0
    Firmware Revision: 06.01C06
    Standards:
    Supported: 6 5 4
    Likely used: 8
    Configuration:
    Logical max current
    cylinders 16383 16383
    heads 16 16
    sectors/track 63 63
    CHS current addressable sectors: 16514064
    LBA user addressable sectors: 156250000
    Logical/Physical Sector size: 512 bytes
    device size with M = 1024*1024: 76293 MBytes
    device size with M = 1000*1000: 80000 MBytes (80 GB)
    cache/buffer size = 8192 KBytes
    Capabilities:
    LBA, IORDY(can be disabled)
    Standby timer values: spec'd by Standard, with device specific minimum
    R/W multiple sector transfer: Max = 16 Current = 8
    Recommended acoustic management value: 128, current value: 254
    DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
    Cycle time: min=120ns recommended=120ns
    PIO: pio0 pio1 pio2 pio3 pio4
    Cycle time: no flow control=120ns IORDY flow control=120ns
    Commands/features:
    Enabled Supported:
    * SMART feature set
    Security Mode feature set
    * Power Management feature set
    * Write cache
    * Look-ahead
    * Host Protected Area feature set
    * WRITE_BUFFER command
    * READ_BUFFER command
    * DOWNLOAD_MICROCODE
    SET_MAX security extension
    Automatic Acoustic Management feature set
    * Device Configuration Overlay feature set
    * Mandatory FLUSH_CACHE
    * SMART error logging
    * SMART self-test
    * Gen1 signaling speed (1.5Gb/s)
    * Host-initiated interface power management
    * SMART Command Transport (SCT) feature set
    * SCT Long Sector Access (AC1)
    * SCT LBA Segment Access (AC2)
    * SCT Error Recovery Control (AC3)
    * SCT Features Control (AC4)
    * SCT Data Tables (AC5)
    Security:
    Master password revision code = 65534
    supported
    not enabled
    not locked
    frozen
    not expired: security count
    not supported: enhanced erase
    Checksum: correct
    Last edited by Inxsible (2011-03-27 04:40:49)

    I just checked my BIOS and my current setting is set at IDE although it also mentions that the default should be AHCI. Currently I have a dual boot of Windows 7 (need it for Tax software) and Arch
    So I guess, when I get the new HDD, I will first set it to AHCI and then install the OSes on it. See if NCQ helps any, and if not I will turn it back and re-install (if I have to). I am planning to have Windows only in virtualbox in the new drive.
    Anyhoo, while I was in the BIOS I found two things which I had questions about :
    1) Under Onboard Devices --> Integrated NIC , my setting is currently set at "On w/PXE" and it says the default should be just "On". Would it be ok to change it back to On since its a single machine and its not booting an OS on any server. I just don't want to have to re-install anything now since I will be doing that in the new HDD.
    2) How would I know whether my BIOS would support a 64 bit OS in Virtualbox? I checked some setting under Virtualization, but they weren't very clear.
    I will edit this post and let you know exactly what settings were present under the Virtualization sub-section.

  • ISSUE:regarding production version tab of MRP4 of  data transfer using BD10

    Hi all,
    This is regarding production version tab of MRP4 of  data transfer using ALE idoc (BD10).
    When i transfer the data using BD10 the production version is received at receiving end through segment
    but not created in MRP4 view tab.An error is coming as-
    "You wanted to maintain the master record of the material AB_06.04.09(2). However, it is already being processed by the user EBGABAP and is therefore locked."
    I logged in as-EBGABAP
    Please help me resolve the issue.
    Thanks
    Edited by: sanu debu on May 6, 2009 11:08 AM
    Edited by: sanu debu on May 6, 2009 11:09 AM
    Edited by: sanu debu on May 6, 2009 11:11 AM

    >
    sanu debu wrote:
    > Hi,
    > I have to upload production version tab data of  MRP4 view(MM01).Please suggest a function  moduleor bapi  for the same.
    >
    > Thanks.
    >
    > Edited by: sanu debu on May 6, 2009 3:24 PM
    BAPI_MATERIAL_SAVEDATA can be used, populate the respective fields in input parameter PLANTDATA

  • Bottleneck in Data Transfer

    We run a small network in our office consisting mainly of Intel iMacs we purchased several months ago. The server computer is a brand new Intel Mac Pro server with 4 500 gig drives raided together, two 2.66GHz dual core intel processors, all the other bells and whistles we could think of, etc. We added in two fiber-optic switches: one in the server room, one in the office. The switches connect to each other and the server with fiber optic cables, but the iMacs connect with ethernet cables.
    We had the iMacs for a while but we just recently got the new server and upgraded our old 100 base switches. Afterwards we wanted to test out the data transfer speeds, as we plan to back up to the server frequently. We were dismayed to find that transfer rates capped out at 60 MegaBytes/sec according to the Activity Monitor's Network Activity tab. In fact, it would range mostly from 40-45MB/sec. None of us here have much experience with networking, but that seemed a tad too slow. My basic math tells me that a byte is 8 bits, and from that a Gigabit network should transfer data at 120 MegaBytes/sec, which is three times the speeds we were actually seeing.
    We sent data both to and from the server in order to test this. Thinking it was perhaps a problem with the ethernet itself, we grabbed an external FireWire hard drive and transferred data from one of the iMacs directly to it and noticed exactly the same transfer rates. We plugged two iMacs directly into each other and transferred at the same rate, ~45MB/sec.
    Well this was highly frustrating. All Macs supposedly ship with Gigabit ethernet since, what, 2002? Earlier? Why are our speeds so slow? We thought the hard drives might be slow, so we got info on the drives and googled them for their tech specs. The iMacs' Western Digital drives are capable of much much faster speeds according to everything we've read.
    We started reading anything we could online that addressed this issue. Some information read the problem might be that the optical DVD-R/CD-R drive was only capable of slower transfer speeds. Since the optical drive and the hard drive are on the same bus it would slow down the hard drive's maximum transfer rate, much like having a Gigabit hub with a 10 base computer plugged into it would slow the entire network down (which is of course why we use switches instead of hubs). Is there any truth to this? If this is, in fact, the case, can we bypass this bottleneck somehow? I'm not talking about opening the computer and manually disabling the optical drive, as that's a waste of a perfectly good DVD-R/CD-R drive.
    Also, if this is true, why in blue blazes is Apple flaunting Gigabit ethernet if the computer can only take advantage of 1/3 the speeds Gigabit ethernet has to offer?! I'll happily provide any more information that's relevant to the problem at hand.
    Thank you
      Mac OS X (10.4.8)  

    Here's the specs for the default Hard Drive that Apple put in here:
    http://www.westerndigital.com/en/products/Products.asp?DriveID=137
    From that page
    Buffer To Host (Serial ATA) 300 MB/s (Max)
    Buffer To Disk 748 Mbits/s (Max)
    I have no idea what signaling overhead for my data transfer protocol means.
    The ethernet cords are no longer than 20 feet, are all Cat5E, and are well shielded. There is little to no ElectroMagnetic interference in any area they run. The longest cable is the Fiber Optic one, which runs about... oh... 40 yards? These were all installed by professionals.
    I feel it's important to stress the fact that we tested an isolated direct computer to computer transfer with a single 6 foot Cat5E Ethernet cable and still experienced the same speeds that we experienced over the network. We tested multiple computers, multiple cables, multiple files.

  • Init w/o data transfer shows Added/Transfrd - 1/1

    Hi ,
    Init w/o data transfer load was successful after having applied <i>Note 689964 - ODS object: Switching from a full to delta upload !</i>
    I have two weird ( nt sure ) issues below :
    <b>Issue 1</b>
    On Manage screen I see Added - 1 & Transferred - 1, however I dont see this record in the DSO ( Display data ).
    Why is that so ?
    <b>
    Issue 2</b>
    All seems green excepting when I go check the Details Tab - I see some reds 
    DataStore Activation (Change Log) : Errors occurred
    No data targets selected for update. Action terminated.
    InfoPackage ZPAK_*** could not be started by Bapi_ipak_start
    Errors in InfoPackage check for DataStore 0CCA_O09 ; no update possible
    Please comment SDNer's

    Dear Jr.Roberto,
    Issue 1
    On Manage screen I see Added - 1 & Transferred - 1, however I dont see this record in the DSO ( Display data ).
    Why is that so ?
    <b>
    --> When you do a init with out data transfer, system transfers one record that is not corresponding to the data, but is a control record corresponding to the init selections.</b>
    Issue 2
    All seems green excepting when I go check the Details Tab - I see some reds
    DataStore Activation (Change Log) : Errors occurred
    No data targets selected for update. Action terminated.
    InfoPackage ZPAK_*** could not be started by Bapi_ipak_start
    Errors in InfoPackage check for DataStore 0CCA_O09 ; no update possible
    <b>---> It is because you dont have a active update rules maintained for the infosource to the data target, or you have not selected any data target in the infopackage , it can also be the case that the infopackage which generates a program to start the load is having some errors, if possbile create another infopackage and start the load with active Update rules to data target.</b>
    Cheers!!!!
    Charan
    Message was edited by:
            Sri Krishna Charan Viswanatha

  • Time Capsule only runs with 1,1Mbit up/down during data transfer, internet speed is ok, TC is used to extend an existing network

    Hello Everyone,
    I have a new 2TB Time Capsule running with a MacBook Air. I want to use the TC to access data (Aperture library, iTunes library, other Files) and to backup my MacBook Air via Time Machine. I set it up, integrated the TC in my Network (FritzBox) by choosing "extend existing network" and it works. BUT only with 1.1Mbit/second while writing or reading Data to/from it. Internet speed is very good, like it was before. While the 1.1Mbit/second seem to be ok with Aperture and iTunes (streaming music and movies) it is still painfully slow and I'm not realy happy with that
    I've read that:
    The 1.1Mbit problem is pretty common when Time Capsule is integrated and used to extend a network (bridge modus), it also looses all ethernet connectivity then (that woul explain why connecting it by ethernet didn't help during initial setup and data transfer)
    Is there a solution besides ditching the Fritzbox and using the TC to build the network? Because basicly I still need the Fritzbox for its DECT features.
    Thank you for any help in advance and have a nice day,
    Olli

    You have double hop wireless with this setup..
    You should bridge the TC.. that is router bridge not wireless bridge, and plug the TC into the Frizyboy by ethernet.
    Then you can setup the TC wireless to reinforce the fritzy..
    Same wireless name as SSID.
    Same security settings... really should be WPA2 AES or in TC personal.
    Same password..
    Just different wireless channel.
    Then you can use 5ghz on the TC if you are up close and personal.

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