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BDB_Prog_Reference.pdf
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am.html
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am_close.html
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am_conf.html
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am_conf_logrec.html
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am_conf_select.html
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am_cursor.html
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am_delete.html
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am_foreign.html
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am_get.html
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am_misc.html
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am_misc_bulk.html
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am_misc_db_sql.html
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am_misc_dbsizes.html
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am_misc_diskspace.html
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am_misc_error.html
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am_misc_faq.html
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am_misc_partial.html
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am_misc_perm.html
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am_misc_stability.html
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am_misc_struct.html
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am_misc_tune.html
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am_opensub.html
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am_partition.html
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am_put.html
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am_second.html
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am_stat.html
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am_sync.html
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am_truncate.html
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am_upgrade.html
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am_verify.html
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apprec.html
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apprec_auto.html
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apprec_config.html
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apprec_def.html
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arch.html
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arch_apis.html
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arch_bigpic.gif
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arch_progmodel.html
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arch_script.html
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arch_smallpic.gif
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arch_utilities.html
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bdb_usenix.pdf
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bt_conf.html
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cam.html
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cam_app.html
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cam_fail.html
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ch13s02.html
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csharp.html
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dumpload.html
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dumpload_format.html
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dumpload_text.html
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embedded.html
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env.html
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env_create.html
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env_db_config.html
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env_encrypt.html
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env_error.html
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env_faq.html
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env_naming.html
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env_open.html
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env_region.html
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env_remote.html
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env_security.html
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env_size.html
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ext.html
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ext_perl.html
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ext_php.html
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general_am_conf.html
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gettingStarted.css
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group_membership.html
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hash_conf.html
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hash_usenix.pdf
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heap_conf.html
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index.html
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intro.html
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intro_dbis.html
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intro_dbisnot.html
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intro_distrib.html
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intro_need.html
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intro_products.html
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intro_terrain.html
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intro_what.html
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intro_where.html
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java.html
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java_compat.html
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java_faq.html
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java_program.html
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libtp_usenix.pdf
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lock.html
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lock_am_conv.html
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lock_cam_conv.html
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lock_config.html
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lock_dead.html
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lock_deaddbg.html
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lock_max.html
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lock_nondb.html
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lock_notxn.html
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lock_page.html
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lock_stdmode.html
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lock_timeout.html
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lock_twopl.html
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log.html
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log_config.html
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log_limits.html
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magic.s5.be.txt
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magic.s5.le.txt
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magic.txt
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moreinfo.html
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mp.html
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mp_config.html
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mp_warm.html
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preface.html
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program.html
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program_cache.html
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program_compatible.html
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program_copy.html
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program_environ.html
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program_errorret.html
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program_faq.html
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program_mt.html
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program_namespace.html
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program_perfmon.html
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program_ram.html
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program_runtime.html
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program_scope.html
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refs.html
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rep.html
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rep_app.html
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rep_base_meth.html
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rep_bulk.html
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rep_clock_skew.html
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rep_comm.html
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rep_elect.html
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rep_ex.html
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rep_ex_chan.html
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rep_ex_comm.html
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rep_ex_rq.html
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rep_faq.html
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rep_filename.html
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rep_id.html
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rep_init.html
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rep_lease.html
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rep_mastersync.html
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rep_mgr_ack.html
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rep_mgr_meth.html
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rep_mgrmulti.html
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rep_newsite.html
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rep_partition.html
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rep_pri.html
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rep_replicate.html
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rep_ryw.html
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rep_trans.html
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rep_twosite.html
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repmgr_channels.html
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rq_conf.html
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second.javas
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sequence.html
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solaris.txt
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stl.html
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stl_complex_rw.html
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stl_container_specific.html
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stl_db_advanced_usage.html
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stl_db_usage.html
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stl_efficienct_use.html
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stl_examples.html
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stl_known_issues.html
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stl_memory_mgmt.html
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stl_misc.html
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stl_mt_usage.html
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stl_persistence.html
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stl_primitive_rw.html
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stl_txn_usage.html
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stl_usecase.html
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tcl.html
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tcl_error.html
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tcl_faq.html
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tcl_program.html
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tcl_using.html
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transapp.cs
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transapp.html
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transapp_admin.html
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transapp_app.html
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transapp_archival.html
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transapp_atomicity.html
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transapp_checkpoint.html
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transapp_cursor.html
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transapp_data_open.html
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transapp_deadlock.html
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transapp_env_open.html
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transapp_fail.html
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transapp_faq.html
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transapp_filesys.html
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transapp_hotfail.html
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transapp_inc.html
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transapp_journal.html
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transapp_logfile.html
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transapp_nested.html
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transapp_put.html
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transapp_read.html
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transapp_reclimit.html
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transapp_recovery.html
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transapp_term.html
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transapp_throughput.html
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transapp_tune.html
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transapp_why.html
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txn.html
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txn_config.html
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txn_limits.html
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witold.html
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writetest.cs
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xa.html
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xa_build.html
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xa_faq.html
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xa_xa_config.html
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xa_xa_intro.html
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xa_xa_restrict.html
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Editing: program_cache.html
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Disk drive caches</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB Programmer's Reference Guide" /> <link rel="up" href="program.html" title="ChapterΒ 15.Β Programmer Notes" /> <link rel="prev" href="program_ram.html" title="Memory-only or Flash configurations" /> <link rel="next" href="program_copy.html" title="Copying or moving databases" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Disk drive caches</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="program_ram.html">Prev</a>Β </td> <th width="60%" align="center">ChapterΒ 15.Β Programmer Notes </th> <td width="20%" align="right">Β <a accesskey="n" href="program_copy.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="program_cache"></a>Disk drive caches</h2> </div> </div> </div> <p>Many disk drives contain onboard caches. Some of these drives include battery-backup or other functionality that guarantees that all cached data will be completely written if the power fails. These drives can offer substantial performance improvements over drives without caching support. However, some caching drives rely on capacitors or other mechanisms that guarantee only that the write of the current sector will complete. These drives can endanger your database and potentially cause corruption of your data.</p> <p>To avoid losing your data, make sure the caching on your disk drives is properly configured so the drive will never report that data has been written unless the data is guaranteed to be written in the face of a power failure. Many times, this means that write-caching on the disk drive must be disabled.</p> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="program_ram.html">Prev</a>Β </td> <td width="20%" align="center"> <a accesskey="u" href="program.html">Up</a> </td> <td width="40%" align="right">Β <a accesskey="n" href="program_copy.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Memory-only or Flash configurationsΒ </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top">Β Copying or moving databases</td> </tr> </table> </div> </body> </html>
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