Hp XP20000XP24000 Disk Array Manuel d'utilisateur télécharger pdf (Page 38)

2-20 About Cross-OS File Exchange Operations

Hitachi USP V Cross-OS File Exchange User’s Guide

Source Dataset Open-System Target File

Record length (max) Record length (max) – 4 bytes

RL Record 1: Data entity

Data entity 1 padding

RL Record 2: Data entity 2

→

Data entity 2

RL Record 3: Data entity 3 Data entity 3 padding

Figure 2-12 FXmto with Variable-Length Records: Padding

With delimiters. Figure 2-13 shows an FXmto operation with delimiters (D)

for a variable-length source dataset. FCU extracts and transfers the data

entities to the open-system target file and adds the requested delimiter to the

end of each data entity. The RL fields are not transferred. The resulting length

of each data entity in a UNIX target file equals the original data entity length

plus one byte for the delimiter. The resulting length of each data entity in a

Windows 2000/2003/ Windows NT target file equals the original data entity

length plus two bytes for the delimiter.

Note: If use FXmto with delimiters and without padding, you will be able to

transfer the variable-length records back to the original dataset later using

FXotm.

Source Dataset Open-System Target File

Record length Data entity length + 1 or 2 bytes

RL Record 1: Data entity 1 Data entity 1 D

RL Record 2: Data entity 2

→

Data entity 2 D

RL Record 3: Data entity 3 Data entity 3 D

Figure 2-13 FXmto with Variable-Length Records: Delimiters

With padding and delimiters. Figure 2-14 shows an FXmto operation with

padding and delimiters (D). FXmto with padding and delimiters requires a

variable-length source file and produces a fixed-length target file. FCU adds

the appropriate delimiter to each data entity, adds the appropriate amount of

‘padding’ so that each record equals the maximum record length, and then

extracts and transfers the data entities with padding and delimiters to the

open-system target file. The RL fields are not transferred.

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Hp XP20000XP24000 Disk Array Manuel d'utilisateur Page 38