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DataMuseum.dkPresents historical artifacts from the history of: IBM System/36 |
This is an automatic "excavation" of a thematic subset of
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Length: 5376 (0x1500)
Notes: FORM36, MEMBER_O
Names: »#HE@FST «
└─⟦5475bb115⟧ Bits:30009795 AS/ENTRY - S/36 SYST SUPP PROG S/36 VALUE ADDED SOFTWARE PACKAGE Refer to Memo 051445 Product Number 5727SS6 Rel 05 Created 19950301 Level 01 Seq 001 of 002
└─⟦cd453c591⟧
└─⟦this⟧ ».#HE@FST «
FormPointer36 {name=»CACHE001«, f1=0x00, start=0x0002, length=0x05, f5=0x00, f6=0x00, f7=0x00, f8=0x00, f9=0000000000000000}
┌────────────────────────────────────────────────────────────────────────────────┐
00│ HELP FOR CACHE PROCEDURE Page 1 of 4 │
01│╳DESCRIPTION ╳ │
02│ │
03│ The disk CACHE procedure allows the system operator to start, alter, or │
04│ stop the disk cache. The cache is used to keep recently accessed disk │
05│ data in main storage to reduce the number of accesses to the disk. │
06│ │
07│ │
08│ │
09│ │
10│ │
11│╳KEYS YOU CAN USE ON CACHE PROCEDURE DISPLAY ╳│
12│ │
13│ Cmd2 - Display the previous prompt │
14│ Cmd3 - Display the previous menu │
15│ Cmd5 - Display the main help menu │
16│ Cmd6 - Display your beginning help menu │
17│ Cmd7 - End help │
18│ Home - Display your sign-on menu │
19│ │
20│ │
21│ │
22│ │
23│ Cmd3-Exit help text Roll keys-Page help text COPR IBM Corp. 1986│
24│ │
25│ │
26│ │
27│ │
└────────────────────────────────────────────────────────────────────────────────┘
FormPointer36 {name=»CACHE002«, f1=0x00, start=0x0007, length=0x04, f5=0x00, f6=0x00, f7=0x00, f8=0x00, f9=0000000000000000}
┌────────────────────────────────────────────────────────────────────────────────┐
00│ HELP FOR CACHE PROCEDURE Page 2 of 4 │
01│ │
02│╳Work with disk cache . . . . . . . . . . . . . START,ALTER,STOP╳ │
03│ │
04│ START - Causes the cache to be created and to be filled with disk data │
05│ as disk operations occur. │
06│ │
07│ ALTER - Causes the cache format to be changed to match the size, page │
08│ size, and disk scan parameters specified. │
09│ │
10│ STOP - Causes the cache to be stopped. │
11│ │
12│ │
13│ │
14│ │
15│ │
16│ │
17│ │
18│ │
19│ │
20│ │
21│ │
22│ │
23│ Cmd3-Exit help text Roll keys-Page help text COPR IBM Corp. 1986│
24│ │
25│ │
26│ │
27│ │
└────────────────────────────────────────────────────────────────────────────────┘
FormPointer36 {name=»CACHE003«, f1=0x00, start=0x000b, length=0x06, f5=0x00, f6=0x00, f7=0x00, f8=0x00, f9=0000000000000000}
┌────────────────────────────────────────────────────────────────────────────────┐
00│ HELP FOR CACHE PROCEDURE Page 3 of 4 │
01│ │
02│╳Cache size in kilobytes . . . . . . . . . . . . . . . . 64-7168╳ │
03│ │
04│ The amount of main storage to be used for the cache. The storage will │
05│ be taken away from the user area. │
06│ │
07│ │
08│╳Cache page size in kilobytes . . . . . . . . . . . . 1,2,4,8,16╳ │
09│ │
10│ The size of the individual pages of the cache. A cache page is the │
11│ smallest amount of contiguous disk data that can be held in the cache. │
12│ │
13│ │
14│ │
15│ Note: For systems with a main storage size of 2 MB or less, the ratio of │
16│ cache size to cache page size must be greater than or equal to 32. │
17│ For systems with more than 2 MB of main storage, the ratio of cache │
18│ size to cache page size must be greater than or equal to the main │
19│ storage size divided by 64. │
20│ │
21│ │
22│ │
23│ Cmd3-Exit help text Roll keys-Page help text COPR IBM Corp. 1986│
24│ │
25│ │
26│ │
27│ │
└────────────────────────────────────────────────────────────────────────────────┘
FormPointer36 {name=»CACHE004«, f1=0x00, start=0x0011, length=0x04, f5=0x00, f6=0x00, f7=0x00, f8=0x80, f9=0000000000000000}
┌────────────────────────────────────────────────────────────────────────────────┐
00│ HELP FOR CACHE PROCEDURE Page 4 of 4 │
01│ │
02│╳Cache disk scan operations. . . . . . . . . . . . . NOSCAN,SCAN╳ │
03│ │
04│ NOSCAN - Disk scan operations are not cached. │
05│ │
06│ SCAN - Disk scan operations are cached. │
07│ │
08│ │
09│ │
10│ │
11│ │
12│ │
13│ │
14│ │
15│ Note: As disk scan operations are issued, the cache is first checked to │
16│ determine if it contains the requested data. If so, the scan is │
17│ performed in memory. If not, an entire cache page containing the │
18│ requested data is read into the cache and then the scan is performed │
19│ in memory. The requested data is moved into the user's buffer if │
20│ a scan hit occurs. │
21│ │
22│ │
23│ Cmd3-Exit help text Roll keys-Page help text COPR IBM Corp. 1992│
24│ │
25│ │
26│ │
27│ │
└────────────────────────────────────────────────────────────────────────────────┘