teradata storage architecture

, which records the major activities of the database and the errors that occurred. The alert file records the significant activities and errors that occurred in the time. The name of the alert file is in the format AlertSID.log. The location of the alert file is determined by the initialization parameter Background_dump_ DESC is specified. Trace files (trace log file): is the trace log file, and each server process and background process writes trace files. For example, when an error occurs in t

-11E6-82BD-000C290973DF master_info_file:/var/lib/mysql/master.info sql_delay:0 Sql_remaining_delay:null Slave_sql_running_state:slave have read all relay log; Waiting for the Slave I/O thread to update it master_retry_count:86400 ...... auto_position:0 Complete the above process, a master-slave MySQL cluster is configured to complete.2-3, one master multiple from the use of the proposalA master multi-slave MySQL cluster solution has been able to solve the performance requirem

,T.extent_management Extman, T.segment_space_management SegmanFrom Dba_tablespaces T,(select Tablespace_name, sum (bytes) allocated, COUNT (file_id) datafiles from Dba_data_files Group by Tablespace_name) d,(select Tablespace_name, sum (bytes) free from Dba_free_space Group by Tablespace_name) F,(select Tablespace_name, sum (bytes) used from Dba_segments Group by Tablespace_name) uwhere T.tablespace_name = D.tablespace_name (+)and T.tablespace_name = F.tablespace_name (+)and T.tablespace_name =

kicked performance nightmare latency one of the sources of production 37. How to avoid evictions planning cache capacity separate permanent data from temporary data without using random characters as key 38.Multiget problem whenmemcached servers is CPU bound, adding more memcached serversdoesn ' t help serve more requests. -Jeff Rothschild, Vice presidentof technology at Facebook 39.Cache Challenge: Multigethole 40. Workaround Memcachedreplication 41. Architectural Challenges: mass

save the above partition information: Step 3 : Format The XFS file system#mkf. xfs/dev/sdb1 Step 4 : Mount the hard drive device to the /newfs directory#Mkdir/newfs#mount/dev/sdb1/newfs Step 5 : Set the system to automatically mount the hard drive device after booting#vim/etc/fstab/DEV/SDB1/NEWFSXFS Defaults 0 0 Step 6 : View the file system situation:DF is used to view mount point information and disk usage-a displays all file systems ( including virtual )-H easier-to-read capacity format-I sh