{"id":4531,"date":"2026-06-14T19:31:10","date_gmt":"2026-06-14T19:31:10","guid":{"rendered":"https:\/\/cloudsave.app\/?p=4531"},"modified":"2026-06-15T14:30:35","modified_gmt":"2026-06-15T14:30:35","slug":"postgresql-wal-arhiv%c4%93%c5%a1ana-bie%c5%be%c4%81k%c4%81s-k%c4%bc%c5%abdas-un-datu-zuduma-riski","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/lv\/knowledge-base\/postgresql-wal-arhiv%c4%93%c5%a1ana-bie%c5%be%c4%81k%c4%81s-k%c4%bc%c5%abdas-un-datu-zuduma-riski\/","title":{"rendered":"PostgreSQL WAL arhiv\u0113\u0161ana: bie\u017e\u0101k\u0101s k\u013c\u016bdas un datu zuduma riski"},"content":{"rendered":"

Datu b\u0101zu administratoriem (DBA) un DevOps in\u017eenieriem, kas p\u0101rvalda PostgreSQL ra\u017eo\u0161anas vid\u0113, m\u0113r\u0137is ir sasniegt gandr\u012bz nulles atkop\u0161anas punkta m\u0113r\u0137i (RPO). PostgreSQL katastrofu atkop\u0161anas un atkop\u0161anas noteikt\u0101 laika punkt\u0101 (PITR) iesp\u0113ju pamat\u0101 ir Write-Ahead Logging (WAL). Lai gan WAL nodro\u0161ina ACID atbilst\u012bbu, re\u0123istr\u0113jot transakcijas pirms to ierakst\u012b\u0161anas datu failos, WAL arhiv\u0113\u0161ana<\/em> ir meh\u0101nisms, kas saglab\u0101 \u0161os \u017eurn\u0101lus ilgtermi\u0146a dubl\u0113\u0161anai un replik\u0101cijai.<\/p>\n

Tom\u0113r WAL arhiv\u0113\u0161anas konfigur\u0113\u0161ana nav darb\u012bba, ko var “uzst\u0101d\u012bt un aizmirst”. Nepareiza konfigur\u0101cija, klusas k\u013c\u016bmes un arhitekt\u016bras p\u0101rpratumi var izrais\u012bt katastrof\u0101lu datu zudumu, “split-brain” scen\u0101rijus vai piln\u012bgu datu b\u0101zes darb\u012bbas p\u0101rtraukumu.<\/p>\n

\u0160aj\u0101 visaptvero\u0161aj\u0101 rokasgr\u0101mat\u0101 m\u0113s izp\u0113t\u012bsim PostgreSQL WAL arhiv\u0113\u0161anas arhitekt\u016bru, identific\u0113sim visbie\u017e\u0101k sastopam\u0101s k\u013c\u016bdas, kas noved pie datu zuduma, un izkl\u0101st\u012bsim ra\u017eo\u0161anas l\u012bme\u0146a lab\u0101ko praksi, lai nodro\u0161in\u0101tu j\u016bsu datu b\u0101zes notur\u012bbu.<\/p>\n

Izpratne par PostgreSQL WAL arhitekt\u016bru<\/h2>\n

Pirms iedzi\u013cin\u0101ties k\u013c\u016bd\u0101s, ir svar\u012bgi saprast, k\u0101 PostgreSQL apstr\u0101d\u0101 transakciju \u017eurn\u0101lus.<\/p>\n

PostgreSQL ieraksta visas modifik\u0101cijas WAL segmentos (p\u0113c noklus\u0113juma 16 MB failos), kas atrodas pg_wal<\/code> direktorij\u0101 (agr\u0101k pg_xlog<\/code> versij\u0101s pirms 10). Katra transakcija tiek re\u0123istr\u0113ta sec\u012bgi, atz\u012bm\u0113ta ar \u017eurn\u0101la sec\u012bbas numuru (LSN).<\/p>\n

Kad WAL segments ir pilns, PostgreSQL p\u0101rsl\u0113dzas uz jaunu. Lai nov\u0113rstu pg_wal<\/code> direktorijas bezgal\u012bgu aug\u0161anu, PostgreSQL p\u0101rstr\u0101d\u0101 vai no\u0146em vecos WAL segmentus, kad tie vairs nav nepiecie\u0161ami av\u0101rijas atkop\u0161anai vai replik\u0101cijai.<\/p>\n

WAL arhiv\u0113\u0161ana<\/strong> p\u0101rtrauc \u0161o p\u0101rstr\u0101des procesu. Kad archive_mode<\/code> ir iesp\u0113jots, PostgreSQL izpilda lietot\u0101ja defin\u0113tu archive_command<\/code> (vai izmanto archive_library<\/code> PostgreSQL 15+ versij\u0101), lai kop\u0113tu pabeigto WAL segmentu uz dro\u0161u, sekund\u0101ru vietu, pirms tas tiek izdz\u0113sts vai p\u0101rrakst\u012bts.<\/p>\n

Lai veiktu atkop\u0161anu noteikt\u0101 laika punkt\u0101 (PITR), jums ir nepiecie\u0161ami divi komponenti:
\n1. Der\u012bga b\u0101zes dubl\u0113jumkopija.
\n2. Nep\u0101rtraukta arhiv\u0113to WAL failu \u0137\u0113de no b\u0101zes dubl\u0113jumkopijas laika l\u012bdz j\u016bsu m\u0113r\u0137a atkop\u0161anas laikam.<\/p>\n

Ja \u0161\u012b WAL \u0137\u0113de ir p\u0101rtraukta, j\u016bsu PITR neizdosies.<\/p>\n

WAL arhiv\u0113\u0161anas konfigur\u0113\u0161ana ra\u017eo\u0161anas videi<\/h2>\n

Lai iesp\u0113jotu WAL arhiv\u0113\u0161anu, jums ir j\u0101modific\u0113 postgresql.conf<\/code> fails. Pamata konfigur\u0101cijai ir nepiecie\u0161ams iestat\u012bt wal_level<\/code>, iesp\u0113jot archive_mode<\/code> un defin\u0113t archive_command<\/code>.<\/p>\n

# postgresql.conf\nwal_level = replica             # 'replica' vai 'logical' ir nepiecie\u0161ams arhiv\u0113\u0161anai\narchive_mode = on               # Iesp\u0113jo arhiv\u0113t\u0101ja procesu\narchive_command = 'test ! -f \/mnt\/nfs\/archive\/%f && cp %p \/mnt\/nfs\/archive\/%f'\narchive_timeout = 600           # Piespiest WAL p\u0101rsl\u0113g\u0161anos ik p\u0113c 10 min\u016bt\u0113m\n<\/code><\/pre>\n
archive_command<\/code> komand\u0101:
\n* %p<\/code> apz\u012bm\u0113 pilnu ce\u013cu l\u012bdz arhiv\u0113jamajam WAL failam.
\n* %f<\/code> apz\u012bm\u0113 WAL faila nosaukumu.<\/p>\n
Lai gan iepriek\u0161 min\u0113t\u0101 konfigur\u0101cija \u0161\u0137iet vienk\u0101r\u0161a, pa\u013cau\u0161an\u0101s uz vienk\u0101r\u0161\u0101m \u010daulas (shell) komand\u0101m uz\u0146\u0113muma vid\u0113 rada iev\u0113rojamus riskus.<\/p>\n
Bie\u017e\u0101k sastopam\u0101s k\u013c\u016bdas WAL arhiv\u0113\u0161an\u0101<\/h2>\n
1. k\u013c\u016bda: archive_command<\/code> “klus\u0101 veiksme”<\/h3>\n
PostgreSQL piln\u012bb\u0101 pa\u013caujas uz archive_command<\/code> izejas kodu. Ja komanda atgrie\u017e 0<\/code>, PostgreSQL pie\u0146em, ka WAL fails ir dro\u0161i arhiv\u0113ts, un turpina p\u0101rstr\u0101d\u0101t ori\u0123in\u0101lo failu.<\/p>\n
Izplat\u012bta k\u013c\u016bda ir t\u0101das komandas izmanto\u0161ana, kas atgrie\u017e 0<\/code> pat tad, ja dati nav dro\u0161i ierakst\u012bti past\u0101v\u012bgaj\u0101 atmi\u0146\u0101. Piem\u0113ram, vienk\u0101r\u0161a cp<\/code> komanda var atgriezt veiksmi, tikl\u012bdz dati non\u0101k OS lapas ke\u0161atmi\u0146\u0101 m\u0113r\u0137a server\u012b. Ja m\u0113r\u0137a serverim paz\u016bd str\u0101va pirms ke\u0161atmi\u0146as ierakst\u012b\u0161anas disk\u0101, WAL fails tiek zaud\u0113ts, bet PostgreSQL jau ir izdz\u0113sis savu lok\u0101lo kopiju.<\/p>\n
Risks:<\/strong> P\u0101rtraukta WAL \u0137\u0113de un nesp\u0113ja veikt PITR, kas tiek atkl\u0101ta tikai katastrofas atkop\u0161anas scen\u0101rija laik\u0101.<\/p>\n
Mazin\u0101\u0161ana:<\/strong> Nodro\u0161iniet, ka j\u016bsu arhiv\u0113\u0161anas skripts izpilda sinhronus ierakstus. Ja izmantojat standarta \u010daulas komandas, izmantojiet r\u012bkus, kas garant\u0113 datu ierakst\u012b\u0161anu, vai uzrakstiet “wrapper” skriptu, kas p\u0113c p\u0101rs\u016bt\u012b\u0161anas p\u0101rbauda faila lielumu un kontrolsummu.<\/p>\n
2. k\u013c\u016bda: pg_wal<\/code> nodal\u012bjuma izsmel\u0161ana (WAL uzbl\u012b\u0161ana)<\/h3>\n
Ja archive_command<\/code> neizdodas (atgrie\u017e kodu, kas nav nulle)\u2014t\u012bkla p\u0101rtraukumu, nepareizu at\u013cauju vai pilna m\u0113r\u0137a diska d\u0113\u013c\u2014PostgreSQL saglab\u0101s WAL failu pg_wal<\/code> direktorij\u0101 un m\u0113\u0123in\u0101s atk\u0101rtot komandu bezgal\u012bgi.<\/p>\n
Lai gan tas nov\u0113r\u0161 datu zudumu, neizdz\u0113\u0161ot nearhiv\u0113tos WAL failus, tas rada nopietnu pieejam\u012bbas risku. Ja pg_wal<\/code> direktorija atrodas nodal\u012bjum\u0101, kas piepild\u0101s l\u012bdz 100%, PostgreSQL izdos PANIC<\/code> un avar\u0113s. Datu b\u0101ze vairs netiks start\u0113ta, kam\u0113r vieta netiks atbr\u012bvota.<\/p>\n
Risks:<\/strong> Piln\u012bga datu b\u0101zes d\u012bkst\u0101ve pilna pg_wal<\/code> nodal\u012bjuma d\u0113\u013c.<\/p>\n
Mazin\u0101\u0161ana:<\/strong>
\n1. Vienm\u0113r novietojiet pg_wal<\/code> uz atsevi\u0161\u0137a diska nodal\u012bjuma.
\n2. Ieviesiet akt\u012bvu pg_wal<\/code> direktorijas lieluma uzraudz\u012bbu.
\n3. Uzraugiet pg_stat_archiver<\/code> skatu, lai nekav\u0113joties atkl\u0101tu neizdevu\u0161\u0101s arhiv\u0113\u0161anas komandas.<\/p>\n
3. k\u013c\u016bda: Nepiln\u012bgas b\u0101zes dubl\u0113jumkopijas<\/h3>\n
B\u0101zes dubl\u0113jumkopija ir bezj\u0113dz\u012bga bez WAL failiem, kas \u0123ener\u0113ti dubl\u0113\u0161anas procesa laik\u0101<\/em>. Ja veicat failu sist\u0113mas l\u012bme\u0146a momentuz\u0146\u0113mumu vai izmantojat pg_basebackup<\/code> bez WAL straum\u0113\u0161anas (-X stream<\/code>), jums ir j\u0101p\u0101rliecin\u0101s, ka WAL faili, kas \u0123ener\u0113ti starp dubl\u0113jumkopijas s\u0101kumu un beig\u0101m, tiek veiksm\u012bgi arhiv\u0113ti.<\/p>\n
Ja j\u016bsu arhiv\u0113t\u0101js kav\u0113jas vai neizdodas, un \u0161ie konkr\u0113tie WAL faili tiek zaud\u0113ti, b\u0101zes dubl\u0113jumkopiju nevar novest konsekvent\u0101 st\u0101vokl\u012b.<\/p>\n
Risks:<\/strong> Boj\u0101tas vai neatkopjamas b\u0101zes dubl\u0113jumkopijas.<\/p>\n
Mazin\u0101\u0161ana:<\/strong> Izmantojiet pg_basebackup -X stream<\/code>, lai iek\u013cautu nepiecie\u0161amos WAL failus pa\u0161\u0101 dubl\u0113jumkopij\u0101, vai izmantojiet uz\u0146\u0113muma l\u012bme\u0146a dubl\u0113\u0161anas risin\u0101jumus, kas autom\u0101tiski p\u0101rvalda atkar\u012bbu starp b\u0101zes dubl\u0113jumkopij\u0101m un WAL segmentiem.<\/p>\n
4. k\u013c\u016bda: Laika l\u012bnijas (Timeline) neskaidr\u012bbas un “split-brain” scen\u0101riji<\/h3>\n
Kad gaidst\u0101ves (standby) serveris tiek paaugstin\u0101ts par prim\u0101ro, PostgreSQL palielina “laika l\u012bnijas ID” (WAL faila nosaukuma pirm\u0101 da\u013ca, piem., 0000000200000001000000A4<\/code>). Tas ne\u013cauj jaunajam prim\u0101rajam serverim p\u0101rrakst\u012bt vec\u0101 prim\u0101r\u0101 servera WAL v\u0113sturi.<\/p>\n
Tom\u0113r, ja vecais prim\u0101rais serveris tiek nejau\u0161i start\u0113ts bez pien\u0101c\u012bgas no\u017eogo\u0161anas (“fencing”\u2014split-brain scen\u0101rijs), tas var m\u0113\u0123in\u0101t nos\u016bt\u012bt WAL failus uz to pa\u0161u arh\u012bva vietu, izmantojot veco laika l\u012bniju. Ja j\u016bsu archive_command<\/code> akli p\u0101rraksta failus, j\u016bs varat saboj\u0101t savu arh\u012bva repozitoriju.<\/p>\n
Risks:<\/strong> P\u0101rrakst\u012bti WAL faili, boj\u0101ti arh\u012bvi un neatkopjamas datu b\u0101zes.<\/p>\n
Mazin\u0101\u0161ana:<\/strong> J\u016bsu archive_command<\/code> nekad nedr\u012bkst p\u0101rrakst\u012bt eso\u0161u failu. Iev\u0113rojiet, ka iepriek\u0161\u0113j\u0101 pamata konfigur\u0101cij\u0101 m\u0113s izmantoj\u0101m test ! -f \/mnt\/nfs\/archive\/%f<\/code>, lai skaidri izrais\u012btu k\u013c\u016bmi, ja fails jau past\u0101v.<\/p>\n
Datu zuduma risku mazin\u0101\u0161ana: Ra\u017eo\u0161anas lab\u0101k\u0101 prakse<\/h2>\n
Lai nostiprin\u0101tu savu PostgreSQL arhiv\u0113\u0161anas strat\u0113\u0123iju, ieviesiet \u0161\u0101du lab\u0101ko praksi.<\/p>\n
1. Uzraugiet arhiv\u0113t\u0101ja procesu nat\u012bvi<\/h3>\n
PostgreSQL nodro\u0161ina ieb\u016bv\u0113tu skatu pg_stat_archiver<\/code>, kas izseko j\u016bsu arhiv\u0113\u0161anas procesa veiksmes un k\u013c\u016bmes. Jums vajadz\u0113tu integr\u0113t \u0161o skatu sav\u0101 nov\u0113ro\u0161anas stak\u0101 (piem., Prometheus, Datadog vai Zabbix).<\/p>\n
SELECT \n    archived_count,\n    last_archived_wal,\n    last_archived_time,\n    failed_count,\n    last_failed_wal,\n    last_failed_time,\n    stats_reset\nFROM pg_stat_archiver;\n<\/code><\/pre>\n
Konfigur\u0113jamie br\u012bdin\u0101jumu sliek\u0161\u0146i:<\/strong>
\n* Br\u012bdin\u0101t, ja failed_count<\/code> palielin\u0101s.
\n* Br\u012bdin\u0101t, ja laika starp\u012bba starp now()<\/code> un last_archived_time<\/code> p\u0101rsniedz j\u016bsu RPO slieksni (piem., 15 min\u016btes), paturot pr\u0101t\u0101, ka datu b\u0101z\u0113s ar zemu trafiku var b\u016bt dabiski kav\u0113jumi, ja vien nav iestat\u012bts archive_timeout<\/code>.<\/p>\n
2. Izmantojiet archive_timeout<\/code><\/h3>\n
Datu b\u0101z\u0113s ar zemu rakst\u012b\u0161anas apjomu 16 MB WAL faila aizpild\u012b\u0161ana var aiz\u0146emt stundas. Kam\u0113r tas nav pilns, tas netiek arhiv\u0113ts. Ja serveris avar\u0113 un lok\u0101lais disks tiek zaud\u0113ts, j\u016bs zaud\u0113jat stund\u0101m ilgas transakcijas.<\/p>\n
Iestat\u012bjums archive_timeout = 600<\/code> (10 min\u016btes) liek PostgreSQL p\u0101rsl\u0113gties uz jaunu WAL failu un arhiv\u0113t pa\u0161reiz\u0113jo, pat ja tas nav pilns. Tas garant\u0113, ka j\u016bsu RPO nep\u0101rsniedz 10 min\u016btes, par cenu nedaudz liel\u0101kam kr\u0101tuves pat\u0113ri\u0146am da\u013c\u0113ji aizpild\u012bto WAL failu d\u0113\u013c.<\/p>\n
3. P\u0101reja uz archive_library<\/code> (PostgreSQL 15+)<\/h3>\n
V\u0113sturiski archive_command<\/code> katram WAL failam izveidoja jaunu \u010daulas procesu. Augstas caurlaid\u012bbas vid\u0113s, kur\u0101s min\u016bt\u0113 tiek \u0123ener\u0113ti simtiem WAL failu, \u010daulas procesu veido\u0161anas izmaksas k\u013c\u016bst par veiktsp\u0113jas v\u0101jo vietu.<\/p>\n
PostgreSQL 15 ieviesa archive_library<\/code> parametru, kas \u013cauj WAL arhiv\u0113\u0161anu apstr\u0101d\u0101t dinamiski iel\u0101d\u0113tiem C modu\u013ciem. Tas nov\u0113r\u0161 \u010daulas procesu veido\u0161anas izmaksas un nodro\u0161ina daudz stabil\u0101ku, augstas veiktsp\u0113jas arhiv\u0113\u0161anas meh\u0101nismu. Ja izmantojat PostgreSQL 15 vai jaun\u0101ku versiju, mekl\u0113jiet dubl\u0113\u0161anas r\u012bkus, kas atbalsta piel\u0101gotus arh\u012bva modu\u013cus.<\/p>\n
4. Regul\u0101ri test\u0113jiet atkop\u0161anu noteikt\u0101 laika punkt\u0101<\/h3>\n
Nep\u0101rbaud\u012bta dubl\u0113jumkopija nav dubl\u0113jumkopija; t\u0101 ir cer\u012bba. Vien\u012bgais veids, k\u0101 p\u0101rbaud\u012bt, vai j\u016bsu WAL arhiv\u0113\u0161ana darbojas pareizi, vai j\u016bsu WAL \u0137\u0113de ir nep\u0101rtraukta un vai j\u016bsu b\u0101zes dubl\u0113jumkopijas ir konsekventas, ir veikt regul\u0101rus, automatiz\u0113tus PITR testus.<\/p>\n
Izveidojiet pagaidu instanci, atjaunojiet b\u0101zes dubl\u0113jumkopiju, konfigur\u0113jiet restore_command<\/code>, lai ieg\u016btu datus no sava arh\u012bva, un atkopiet l\u012bdz konkr\u0113tam laika z\u012bmogam. P\u0101rbaudiet, vai datu b\u0101ze sasniedz konsekventu st\u0101vokli un atveras savienojumiem.<\/p>\n
Uz\u0146\u0113muma l\u012bme\u0146a dubl\u0113\u0161ana un atkop\u0161ana ar CloudSave<\/h2>\n
Piel\u0101gotu \u010daulas skriptu p\u0101rvald\u012bba archive_command<\/code> vajadz\u012bb\u0101m, WAL dedublik\u0101cijas apstr\u0101de un dro\u0161as, \u0101rpus telp\u0101m eso\u0161as kr\u0101tuves nodro\u0161in\u0101\u0161ana transakciju \u017eurn\u0101liem var \u0101tri k\u013c\u016bt par operat\u012bvu slogu IT komand\u0101m.<\/p>\n
\u0160eit CloudSave sniedz b\u016btisku v\u0113rt\u012bbu uz\u0146\u0113muma PostgreSQL vid\u0113m. CloudSave integr\u0113jas tie\u0161i ar PostgreSQL nat\u012bvaj\u0101m dubl\u0113\u0161anas un WAL arhiv\u0113\u0161anas API, lai nov\u0113rstu iepriek\u0161 min\u0113t\u0101s manu\u0101l\u0101s k\u013c\u016bdas.<\/p>\n
T\u0101 viet\u0101, lai rakst\u012btu trauslus bash skriptus, CloudSave nodro\u0161ina stabilu, uz a\u0123entiem balst\u012btu vai bez-a\u0123enta integr\u0101ciju, kas:
\n* Garant\u0113 pieg\u0101di:<\/strong> Aizst\u0101j standarta \u010daulas komandas ar verific\u0113t\u0101m, kontrolsummu valid\u0113t\u0101m p\u0101rs\u016bt\u012b\u0161an\u0101m uz dro\u0161u \u0101r\u0113jo vai m\u0101ko\u0146kr\u0101tuvi.
\n* Nov\u0113r\u0161 WAL uzbl\u012b\u0161anu:<\/strong> Akt\u012bvi uzrauga pg_wal<\/code> direktoriju un br\u012bdina administratorus ilgi pirms nodal\u012bjuma izsmel\u0161anas.
\n* Automatiz\u0113 PITR:<\/strong> Vienk\u0101r\u0161o atkop\u0161anu noteikt\u0101 laika punkt\u0101, izmantojot intuit\u012bvu saskarni. J\u016bs izv\u0113laties prec\u012bzu min\u016bti, l\u012bdz kurai v\u0113laties atgriezties, un CloudSave autom\u0101tiski izg\u016bst pareizo b\u0101zes dubl\u0113jumkopiju un straum\u0113 prec\u012bzu WAL failu sec\u012bbu, kas nepiecie\u0161ama, lai sasniegtu \u0161o st\u0101vokli.
\n* Apstr\u0101d\u0101 laika l\u012bnijas:<\/strong> Inteli\u0123enti p\u0101rvalda PostgreSQL laika l\u012bniju v\u0113sturi, nodro\u0161inot, ka failoveri un “split-brain” scen\u0101riji neboj\u0101 j\u016bsu dubl\u0113jumkopiju repozitoriju.<\/p>\n
Uzticot WAL p\u0101rvald\u012bbas smago darbu CloudSave, DBA var koncentr\u0113ties uz vaic\u0101jumu optimiz\u0101ciju un datu b\u0101zes veiktsp\u0113ju, zinot, ka vi\u0146u RPO un RTO SLA aizsarg\u0101 uz\u0146\u0113muma l\u012bme\u0146a platforma.<\/p>\n
Secin\u0101jums<\/h2>\n
PostgreSQL WAL arhiv\u0113\u0161ana ir datu b\u0101zes katastrofu atkop\u0161anas mugurkauls. Lai gan faila kop\u0113\u0161anas koncepcija no vienas direktorijas uz citu \u0161\u0137iet vienk\u0101r\u0161a, robe\u017egad\u012bjumi\u2014klusas k\u013c\u016bmes, diska izsmel\u0161ana un laika l\u012bniju novirzes\u2014rada nopietnus riskus datu integrit\u0101tei.<\/p>\n
Izprotot pg_wal<\/code> arhitekt\u016bru, stingri izvairoties no destrukt\u012bv\u0101m archive_command<\/code> konfigur\u0101cij\u0101m, uzraugot pg_stat_archiver<\/code> un izmantojot uz\u0146\u0113muma dubl\u0113\u0161anas platformas, piem\u0113ram, CloudSave, j\u016bs varat izveidot notur\u012bgu PostgreSQL infrastrukt\u016bru, kas sp\u0113j p\u0101rdz\u012bvot aparat\u016bras k\u013c\u016bmes, cilv\u0113ku k\u013c\u016bdas un katastrof\u0101lus p\u0101rtraukumus, nezaud\u0113jot nevienu apstiprin\u0101tu transakciju.<\/p>\n
\n
Atkl\u0101jiet bie\u017e\u0101k sastopam\u0101s PostgreSQL WAL arhiv\u0113\u0161anas k\u013c\u016bdas, kas noved pie datu zuduma. Apg\u016bstiet ekspertu DBA lab\u0101ko praksi, konfigur\u0101cijas padomus un to, k\u0101 nodro\u0161in\u0101t uzticamu atkop\u0161anu noteikt\u0101 laika punkt\u0101 (PITR) uz\u0146\u0113muma datu b\u0101z\u0113m.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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