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Show mapped paths in ontape restore

Customer has two instances in same server one "real" for production and one for development. Development instance data is synchronized from real data by restoring production instance ontape Level 0. As both are in the same server, a chunk mapping feature is used to restore from "production" chunks to "development" chunk names.

If the mapping is not well done, we can overwrite production chunks trying to restore development instance and this can be a critical issue.

Having feedback in ontape restore process of mapped chunk names is critical before starting restore to ensure all chunks are mapped and every think will work as expected.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Oct 6 2020
  • Under Review
Informix / Informix Server
Who would benefit from this IDEA? As a customer with multiple instance servers this is a critical feature.
How should it work?

whe using ontape restore with mapping chunks:

$ ontape -r -rename -f ontape_chunks.txt -t BACKUPS/pdbreal_0_L0

when linsting the chunks to restore, currently we get the names of original chunks stored in the tape (BACKUPS/pdbreal_0_L0 )

Example:

Chunks
chk/dbs offset   size     free     bpages   flags pathname
1   1   0        4000000  3907040           PO--- /INFORMIXDEV/pdbreal/rootdbs
2   2   0        11392341 5                 PO--E /INFORMIXDEV/pdbreal/l_phys
3   3   0        7000000  548973            PO--E /INFORMIXDEV/pdbreal/l_log1
4   4   0        7000000  698973            PO--E /INFORMIXDEV/pdbreal/l_log2
5   5   0        5000000  4795050           PO--- /INFORMIXDEV/pdbreal/t_tmp1
6   6   0        5000000  4794873           PO--- /INFORMIXDEV/pdbreal/t_tmp2
7   7   0        6000000  5795091           PO--E /INFORMIXDEV/pdbreal/t_tmp3
8   8   0        5000000  4795074           PO--- /INFORMIXDEV/pdbreal/t_tmp4
9   9   0        2000000  1998933           PO--- /INFORMIXDEV/pdbreal/r_qhdr_1

Continue restore? (y/n)

The mapping file has this content:

/INFORMIXDEV/pdbreal/rootdbs        0   /INFORMIXDEV/pdbdevel/rootdbs       0
/INFORMIXDEV/pdbreal/l_phys         0   /INFORMIXDEV/pdbdevel/l_phys        0
/INFORMIXDEV/pdbreal/l_log1         0   /INFORMIXDEV/pdbdevel/l_log1        0
/INFORMIXDEV/pdbreal/l_log2         0   /INFORMIXDEV/pdbdevel/l_log2        0
/INFORMIXDEV/pdbreal/t_tmp1         0   /INFORMIXDEV/pdbdevel/t_tmp1        0
/INFORMIXDEV/pdbreal/t_tmp2         0   /INFORMIXDEV/pdbdevel/t_tmp2        0
/INFORMIXDEV/pdbreal/t_tmp3         0   /INFORMIXDEV/pdbdevel/t_tmp3        0
/INFORMIXDEV/pdbreal/t_tmp4         0   /INFORMIXDEV/pdbdevel/t_tmp4        0
/INFORMIXDEV/pdbreal/r_qhdr_1       0   /INFORMIXDEV/pdbdevel/r_qhdr_1      0

we propose to show the mapped names so we can check every chunk is properly mapped before starting restore:

Chunks
chk/dbs offset   size     free     bpages   flags pathname
1   1   0        4000000  3907040           PO--- /INFORMIXDEV/pdbdevel/rootdbs
2   2   0        11392341 5                 PO--E /INFORMIXDEV/pdbdevel/l_phys
3   3   0        7000000  548973            PO--E /INFORMIXDEV/pdbdevel/l_log1
4   4   0        7000000  698973            PO--E /INFORMIXDEV/pdbdevel/l_log2
5   5   0        5000000  4795050           PO--- /INFORMIXDEV/pdbdevel/t_tmp1
6   6   0        5000000  4794873           PO--- /INFORMIXDEV/pdbdevel/t_tmp2
7   7   0        6000000  5795091           PO--E /INFORMIXDEV/pdbdevel/t_tmp3
8   8   0        5000000  4795074           PO--- /INFORMIXDEV/pdbdevel/t_tmp4
9   9   0        2000000  1998933           PO--- /INFORMIXDEV/pdbdevel/r_qhdr_1

Continue restore? (y/n)

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Attachments Open full size

Idea Priority Medium
Client Name DEISTER, S.A.
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