Changes

Summary

1. prefer old-style import "=>";
2. merged
3. redundant (see also 3069da1743bc);
4. removed obsolete table (see also 6acd1a2bd146);
5. more robust init_database(); proper treatment of views, not tables (amending dd350a41594c);
6. proper private_data.transaction_lock; prefer execute_batch_statement;
7. clarified names;
8. proper support for SSH;
9. tuned signature;
10. tuned imports;
11. add module for faster scheduled builds;
12. always use host database and make protected;
13. read relative cpu from build log;
14. prefer extensible next_node_info in build process over process_options in build engine (which needs the final node info anyway);
15. added start date to build jobs, e.g., for build time estimation;
16. added initial version of benchmark module, e.g., to compare performance of different hosts; added benchmark operation to build cluster;
17. generalized node infos: allow addressing of numa node segments via relative cpus; add more node options and process policy options using taskset as alternative to NUMA for more fine-grained cpu controls (e.g., for cpus with heterogeneous cores in the same NUMA segment);
18. add information about static host resources such as available NUMA nodes, cpus, etc. (e.g., for offline build planning);
19. added Range object to Host, e.g. to parse/unparse NUMA node ranges;
20. defined statically known tables of Build_Log; read hostname from build logs, store in Session_Entry (e.g., to track hosts in distributed build);