{"id":4526,"date":"2026-06-14T19:31:10","date_gmt":"2026-06-14T19:31:10","guid":{"rendered":"https:\/\/cloudsave.app\/?p=4526"},"modified":"2026-06-15T14:24:52","modified_gmt":"2026-06-15T14:24:52","slug":"cartlann%c3%ba-wal-postgresql-gaist%c3%ad-coitianta-agus-riosca%c3%ad-caillteanais-sonra%c3%ad","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/ga\/knowledge-base\/cartlann%c3%ba-wal-postgresql-gaist%c3%ad-coitianta-agus-riosca%c3%ad-caillteanais-sonra%c3%ad\/","title":{"rendered":"Cartlann\u00fa WAL PostgreSQL: Gaist\u00ed Coitianta agus Riosca\u00ed Caillteanais Sonra\u00ed"},"content":{"rendered":"

Do Riarth\u00f3ir\u00ed Bunachar Sonra\u00ed (DBAnna) agus innealt\u00f3ir\u00ed DevOps a bhainist\u00edonn PostgreSQL i dtimpeallacht t\u00e1irgthe, is pr\u00edomhord\u00fa \u00e9 cusp\u00f3ir pointe t\u00e9arnaimh (RPO) gar do nialas a bhaint amach. I gcro\u00edl\u00e1r chumais t\u00e9arnaimh \u00f3 thubaiste agus T\u00e9arnamh go Pointe Ama (PITR) PostgreSQL t\u00e1 Log\u00e1il Scr\u00edobh-Ar-T\u00fas (WAL). C\u00e9 go gcinnteoidh WAL comhl\u00edonadh ACID tr\u00ed idirbhearta a log\u00e1il sula scr\u00edobhtar iad chuig na comhaid sonra\u00ed, is \u00e9 cartlann\u00fa<\/em> WAL an mheicn\u00edocht a chaomhna\u00edonn na loga\u00ed seo le haghaidh c\u00faltaca agus macasamhl\u00fa fadt\u00e9armach.<\/p>\n

Mar sin f\u00e9in, n\u00ed oibr\u00edocht \u00e9 cumr\u00fa cartlannaithe WAL ar f\u00e9idir \u00e9 a “shocr\u00fa agus dearmad a dh\u00e9anamh air”. Is f\u00e9idir le m\u00edchumra\u00edochta\u00ed, teipeanna ci\u00faine, agus m\u00edthuiscint\u00ed ailtireachta a bheith mar thoradh ar chaillteanas tubaisteach sonra\u00ed, c\u00e1sanna scoilte-inchinne, n\u00f3 briseadh ioml\u00e1n ar an mbunachar sonra\u00ed.<\/p>\n

Sa treoir chuimsitheach seo, d\u00e9anfaimid ini\u00fachadh ar ailtireacht cartlannaithe WAL PostgreSQL, sainaithneoimid na gaist\u00ed is coitianta a fh\u00e1gann go gcailltear sonra\u00ed, agus leagfaimid amach dea-chleachtais ar ghr\u00e1d t\u00e1irgthe chun a chinnti\u00fa go bhfanann do bhunachar sonra\u00ed athl\u00e9imneach.<\/p>\n

Ailtireacht WAL PostgreSQL a Thuiscint<\/h2>\n

Sula dt\u00e9ann t\u00fa i ngleic leis na gaist\u00ed, t\u00e1 s\u00e9 r\u00edth\u00e1bhachtach a thuiscint conas a l\u00e1imhse\u00e1lann PostgreSQL loga\u00ed idirbhirt.<\/p>\n

Scr\u00edobhann PostgreSQL gach modhn\u00fa chuig deighleoga WAL (16MB de r\u00e9ir r\u00e9amhshocraithe) at\u00e1 suite sa chomhadlann pg_wal<\/code> (pg_xlog<\/code> roimhe seo i leaganacha roimh 10). D\u00e9antar gach idirbheart a thaifeadadh go seicheamhach, marc\u00e1ilte le Uimhir Seicheamh Loga (LSN).<\/p>\n

Nuair a l\u00edonann deighleog WAL, aistr\u00edonn PostgreSQL chuig ceann nua. Chun cosc a chur ar an gcomhadlann pg_wal<\/code> f\u00e1s go h\u00e9igr\u00edochta, athch\u00fars\u00e1lann n\u00f3 baineann PostgreSQL seandeighleoga WAL nuair nach bhfuil g\u00e1 leo a thuilleadh le haghaidh t\u00e9arnamh \u00f3 thuairte\u00e1il n\u00f3 macasamhl\u00fa.<\/p>\n

Idircheapann Cartlann\u00fa WAL<\/strong> an pr\u00f3iseas athch\u00fars\u00e1la seo. Nuair a bh\u00edonn archive_mode<\/code> cumasaithe, cuireann PostgreSQL archive_command<\/code> sainithe ag an \u00fas\u00e1ideoir i bhfeidhm (n\u00f3 \u00fas\u00e1ideann s\u00e9 archive_library<\/code> i PostgreSQL 15+) chun an deighleog WAL cr\u00edochnaithe a ch\u00f3ipe\u00e1il chuig su\u00edomh sl\u00e1n t\u00e1naisteach sula scriostar n\u00f3 sula n-oscr\u00edobhtar \u00e9.<\/p>\n

Chun T\u00e9arnamh go Pointe Ama (PITR) a dh\u00e9anamh, teasta\u00edonn dh\u00e1 chomhph\u00e1irt uait:
\n1. C\u00faltaca bonn bail\u00ed.
\n2. Slabhra gan bhriseadh de chomhaid WAL cartlannaithe \u00f3 am an ch\u00faltaca bonn go dt\u00ed an t-am t\u00e9arnaimh sprice at\u00e1 uait.<\/p>\n

M\u00e1 bhriseann an slabhra WAL sin, teipeann ar do PITR.<\/p>\n

Cartlann\u00fa WAL a Chumr\u00fa le haghaidh T\u00e1irgthe<\/h2>\n

Chun cartlann\u00fa WAL a chumas\u00fa, n\u00ed m\u00f3r duit do chomhad postgresql.conf<\/code> a mhodhn\u00fa. \u00c9il\u00edonn cumra\u00edocht bhun\u00fasach an wal_level<\/code> a shocr\u00fa, archive_mode<\/code> a chumas\u00fa, agus an archive_command<\/code> a shaini\u00fa.<\/p>\n

# postgresql.conf\nwal_level = replica             # t\u00e1 g\u00e1 le 'replica' n\u00f3 'logical' le haghaidh cartlannaithe\narchive_mode = on               # Cumasa\u00edonn s\u00e9 an pr\u00f3iseas cartlannaithe\narchive_command = 'test ! -f \/mnt\/nfs\/archive\/%f && cp %p \/mnt\/nfs\/archive\/%f'\narchive_timeout = 600           # Cuir iallach ar lasc WAL gach 10 n\u00f3im\u00e9ad\n<\/code><\/pre>\n
Sa archive_command<\/code>:
\n* L\u00e9ir\u00edonn %p<\/code> an cos\u00e1n ioml\u00e1n chuig an gcomhad WAL le cartlann\u00fa.
\n* L\u00e9ir\u00edonn %f<\/code> ainm comhaid an chomhaid WAL.<\/p>\n
C\u00e9 go bhfuil an chumra\u00edocht thuas simpl\u00ed, tugann brath ar ghn\u00e1th-orduithe bhlaosc i dtimpeallachta\u00ed fiontair riosca\u00ed suntasacha isteach.<\/p>\n
Gaist\u00ed Coitianta i gCartlann\u00fa WAL<\/h2>\n
Ghaiste 1: “Rath Ci\u00fain” an archive_command<\/code><\/h3>\n
Braitheann PostgreSQL go hioml\u00e1n ar ch\u00f3d scoir an archive_command<\/code>. M\u00e1 fhilltear 0<\/code> \u00f3n ord\u00fa, glacann PostgreSQL leis go bhfuil an comhad WAL cartlannaithe go s\u00e1bh\u00e1ilte agus t\u00e9ann s\u00e9 ar aghaidh chun an bunchomhad a athch\u00fars\u00e1il.<\/p>\n
Bot\u00fan coitianta is ea ord\u00fa a \u00fas\u00e1id a fhilltear 0<\/code> fi\u00fa mura bhfuil na sonra\u00ed sruthlaithe go s\u00e1bh\u00e1ilte chuig st\u00f3r\u00e1il bhuan. Mar shampla, d’fh\u00e9adfadh ord\u00fa simpl\u00ed cp<\/code> rath a thabhairt ar ais a luaithe a shroicheann na sonra\u00ed an taisce leathanach OS ar an bhfreastala\u00ed ceann scr\u00edbe. M\u00e1 chailleann an freastala\u00ed ceann scr\u00edbe cumhacht sula sruthla\u00edtear an taisce chuig an diosca, cailltear an comhad WAL, ach t\u00e1 a ch\u00f3ip \u00e1iti\u00fail scriosta ag PostgreSQL cheana f\u00e9in.<\/p>\n
An Riosca:<\/strong> Slabhra WAL briste agus neamh\u00e1baltacht PITR a dh\u00e9anamh, nach bhfaightear amach ach le linn c\u00e1s t\u00e9arnaimh \u00f3 thubaiste.<\/p>\n
An Maol\u00fa:<\/strong> Cinntigh go gcuireann do script cartlannaithe scr\u00edobh sioncronach i bhfeidhm. M\u00e1 \u00fas\u00e1ideann t\u00fa gn\u00e1th-orduithe bhlaosc, bain \u00fas\u00e1id as uirlis\u00ed a r\u00e1tha\u00edonn go sruthla\u00edtear sonra\u00ed, n\u00f3 scr\u00edobh script fillte\u00e1in a fh\u00edora\u00edonn m\u00e9id an chomhaid agus an seicshuim tar \u00e9is an aistrithe.<\/p>\n
Ghaiste 2: \u00cddi\u00fa Deighilt pg_wal<\/code> (Bloat WAL)<\/h3>\n
M\u00e1 theipeann ar an archive_command<\/code> (c\u00f3d scoir neamh-nialas a thabhairt ar ais)\u2014mar gheall ar bhriseadh l\u00edonra, ceadanna m\u00edchearta, n\u00f3 diosca ceann scr\u00edbe l\u00e1n\u2014coime\u00e1dfaidh PostgreSQL an comhad WAL sa chomhadlann pg_wal<\/code> agus d\u00e9anfaidh s\u00e9 iarracht ar an ord\u00fa ar\u00eds go h\u00e9igr\u00edochta.<\/p>\n
C\u00e9 go gcuireann s\u00e9 seo cosc ar chaillteanas sonra\u00ed tr\u00ed WALanna neamhchartlannaithe a scriosadh, tugann s\u00e9 riosca tromch\u00faiseach infhaighteachta isteach. M\u00e1 t\u00e1 an chomhadlann pg_wal<\/code> ar dheighilt a l\u00edonann suas go 100%, eiseoidh PostgreSQL PANIC<\/code> agus tuairte\u00e1lfaidh s\u00e9. N\u00ed thos\u00f3idh an bunachar sonra\u00ed ar\u00eds go dt\u00ed go nglanfar sp\u00e1s.<\/p>\n
An Riosca:<\/strong> Am aga bunachar sonra\u00ed ioml\u00e1n mar gheall ar dheighilt pg_wal<\/code> l\u00e1n.<\/p>\n
An Maol\u00fa:<\/strong>
\n1. Cuir pg_wal<\/code> ar dheighilt diosca tiomnaithe i gc\u00f3na\u00ed.
\n2. Cuir monat\u00f3ireacht ionsaitheach i bhfeidhm ar mh\u00e9id na comhadlainne pg_wal<\/code>.
\n3. D\u00e9an monat\u00f3ireacht ar an amharc pg_stat_archiver<\/code> chun orduithe cartlainne at\u00e1 ag teip a bhrath l\u00e1ithreach.<\/p>\n
Ghaiste 3: C\u00faltaca\u00ed Bonn Neamhioml\u00e1na<\/h3>\n
N\u00edl aon \u00fas\u00e1id le c\u00faltaca bonn gan na comhaid WAL a ghintear le linn<\/em> an phr\u00f3isis ch\u00faltaca. M\u00e1 ghlacann t\u00fa l\u00e9argas ar leibh\u00e9al an ch\u00f3rais comhad n\u00f3 m\u00e1 \u00fas\u00e1ideann t\u00fa pg_basebackup<\/code> gan na WALanna a shruth\u00fa (-X stream<\/code>), n\u00ed m\u00f3r duit a chinnti\u00fa go gcartlanna\u00edtear na comhaid WAL a ghintear idir t\u00fas agus deireadh an ch\u00faltaca go rath\u00fail.<\/p>\n
M\u00e1 t\u00e1 do chartlanna\u00ed ag moilli\u00fa n\u00f3 ag teip, agus m\u00e1 chailltear na comhaid WAL sonracha sin, n\u00ed f\u00e9idir an c\u00faltaca bonn a thabhairt go staid chomhsheasmhach.<\/p>\n
An Riosca:<\/strong> C\u00faltaca\u00ed bonn truaillithe n\u00f3 neamh-in-aisghabh\u00e1la.<\/p>\n
An Maol\u00fa:<\/strong> \u00das\u00e1id pg_basebackup -X stream<\/code> chun na comhaid WAL riachtanacha a chur san \u00e1ireamh laistigh den ph\u00e1lasta c\u00faltaca f\u00e9in, n\u00f3 bain \u00fas\u00e1id as r\u00e9itigh ch\u00faltaca fiontair a bhainist\u00edonn an sple\u00e1chas idir c\u00faltaca\u00ed bonn agus deighleoga WAL go huathoibr\u00edoch.<\/p>\n
Ghaiste 4: Mearbhall Aml\u00edne agus C\u00e1sanna Scoilte-Inchinne<\/h3>\n
Nuair a dh\u00e9antar freastala\u00ed fuireachais a chur chun cinn go pr\u00edomhfhreastala\u00ed, m\u00e9ada\u00edonn PostgreSQL an “Aitheantas Aml\u00edne” (an ch\u00e9ad chuid d’ainm comhaid WAL, m.sh., 0000000200000001000000A4<\/code>). Cuireann s\u00e9 seo cosc ar an bpr\u00edomhfhreastala\u00ed nua stair WAL an tsean-phr\u00edomhfhreastala\u00ed a fhorscr\u00edobh.<\/p>\n
Mar sin f\u00e9in, m\u00e1 thosa\u00edtear an sean-phr\u00edomhfhreastala\u00ed de thaisme gan \u00e9 a fh\u00e1l\u00fa i gceart (c\u00e1s scoilte-inchinne), d’fh\u00e9adfadh s\u00e9 iarracht a dh\u00e9anamh comhaid WAL a bhr\u00fa chuig an su\u00edomh cartlainne c\u00e9anna ag baint \u00fas\u00e1ide as an sean-aml\u00edne. M\u00e1 fhorscr\u00edobhann do archive_command<\/code> comhaid go dall, d’fh\u00e9adf\u00e1 do st\u00f3r cartlainne a thruailli\u00fa.<\/p>\n
An Riosca:<\/strong> Comhaid WAL forscr\u00edofa, cartlanna truaillithe, agus bunachair sonra\u00ed neamh-in-aisghabh\u00e1la.<\/p>\n
An Maol\u00fa:<\/strong> N\u00edor cheart do archive_command<\/code> comhad at\u00e1 ann cheana a fhorscr\u00edobh riamh<\/em>. Tabhair faoi deara sa chumra\u00edocht bhun\u00fasach n\u00edos luaithe, d’\u00fas\u00e1ideamar test ! -f \/mnt\/nfs\/archive\/%f<\/code> chun teip go sainr\u00e1ite m\u00e1 t\u00e1 an comhad ann cheana f\u00e9in.<\/p>\n
Riosca\u00ed Caillteanais Sonra\u00ed a Mhaol\u00fa: Dea-Chleachtais T\u00e1irgthe<\/h2>\n
Chun do strait\u00e9is cartlannaithe PostgreSQL a chruadh\u00fa, cuir na dea-chleachtais seo a leanas i bhfeidhm.<\/p>\n
1. Monat\u00f3ireacht a dh\u00e9anamh ar an bPr\u00f3iseas Cartlannaithe go D\u00fachasach<\/h3>\n
Sol\u00e1thra\u00edonn PostgreSQL amharc ionsuite, pg_stat_archiver<\/code>, a riana\u00edonn rath agus teip do phr\u00f3isis cartlannaithe. Ba cheart duit an t-amharc seo a chomhth\u00e1th\u00fa i do chruach breathnaitheachta (m.sh., Prometheus, Datadog, n\u00f3 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
Tairseacha fol\u00e1irimh le cumr\u00fa:<\/strong>
\n* Tabhair fol\u00e1ireamh m\u00e1 mh\u00e9ada\u00edonn failed_count<\/code>.
\n* Tabhair fol\u00e1ireamh m\u00e1 sh\u00e1ra\u00edonn an difr\u00edocht ama idir now()<\/code> agus last_archived_time<\/code> do thairseach RPO (m.sh., 15 n\u00f3im\u00e9ad), ag cuimhneamh go bhf\u00e9adfadh moilleanna a bheith ag bunachair sonra\u00ed le tr\u00e1cht \u00edseal go n\u00e1d\u00fartha mura bhfuil archive_timeout<\/code> socraithe.<\/p>\n
2. Bain \u00fas\u00e1id as archive_timeout<\/code><\/h3>\n
I mbunachair sonra\u00ed le toirt scr\u00edofa \u00edseal, d’fh\u00e9adfadh uaireanta a bheith i gceist le comhad WAL 16MB a l\u00edonadh. Go dt\u00ed go l\u00edonann s\u00e9, n\u00ed dh\u00e9antar \u00e9 a chartlann\u00fa. M\u00e1 thuairte\u00e1lann an freastala\u00ed agus m\u00e1 chailltear an diosca \u00e1iti\u00fail, caillfidh t\u00fa uaireanta d’idirbhearta.<\/p>\n
M\u00e1 shocra\u00edtear archive_timeout = 600<\/code> (10 n\u00f3im\u00e9ad) cuirtear iallach ar PostgreSQL aistri\u00fa chuig comhad WAL nua agus an ceann reatha a chartlann\u00fa, fi\u00fa mura bhfuil s\u00e9 l\u00e1n. R\u00e1tha\u00edonn s\u00e9 seo nach s\u00e1r\u00f3idh do RPO 10 n\u00f3im\u00e9ad, ar chostas \u00fas\u00e1id st\u00f3r\u00e1la beag\u00e1n n\u00edos airde mar gheall ar chomhaid WAL at\u00e1 l\u00edonta go p\u00e1irteach.<\/p>\n
3. Aistri\u00fa chuig archive_library<\/code> (PostgreSQL 15+)<\/h3>\n
Go stairi\u00fail, sceith archive_command<\/code> pr\u00f3iseas bhlaosc nua do gach comhad WAL aonair. I dtimpeallachta\u00ed ard-tr\u00e9chur a ghineann na c\u00e9adta comhad WAL in aghaidh an n\u00f3im\u00e9id, \u00e9ir\u00edonn an forchostas a bhaineann le pr\u00f3isis bhlaosc a fhorc\u00e1il ina bhacainn feidhm\u00edochta.<\/p>\n
Thug PostgreSQL 15 an paraim\u00e9adar archive_library<\/code> isteach, rud a ligeann do chartlann\u00fa WAL a bheith l\u00e1imhse\u00e1ilte ag mod\u00fail C a lucht\u00fa go dinimici\u00fail. Cuireann s\u00e9 seo deireadh leis an bhforchostas forc\u00e1la bhlaosc agus sol\u00e1thra\u00edonn s\u00e9 meicn\u00edocht cartlannaithe i bhfad n\u00edos l\u00e1idre agus ardfheidhm\u00edochta. M\u00e1 t\u00e1 t\u00fa ar PostgreSQL 15 n\u00f3 n\u00edos airde, lorg uirlis\u00ed c\u00faltaca a thaca\u00edonn le mod\u00fail cartlainne saincheaptha.<\/p>\n
4. T\u00e1st\u00e1il Rialta ar Th\u00e9arnamh go Pointe Ama<\/h3>\n
N\u00ed c\u00faltaca \u00e9 c\u00faltaca n\u00e1r t\u00e1st\u00e1ladh; is mian \u00e9. Is \u00e9 an t-aon bhealach chun a fh\u00edor\u00fa go bhfuil do chartlann\u00fa WAL ag feidhmi\u00fa i gceart, go bhfuil do shlabhra WAL gan bhriseadh, agus go bhfuil do ch\u00faltaca\u00ed bonn comhsheasmhach, n\u00e1 t\u00e1st\u00e1lacha PITR uathoibrithe rialta a dh\u00e9anamh.<\/p>\n
Cuir t\u00fas le hinsealbh\u00fa sealadach, athch\u00f3irigh an c\u00faltaca bonn, cumraigh restore_command<\/code> chun tarraingt \u00f3 do chartlann, agus t\u00e9arnamh go stampa ama sonrach. F\u00edoraigh go sroicheann an bunachar sonra\u00ed staid chomhsheasmhach agus go n-oscla\u00edonn s\u00e9 le haghaidh naisc.<\/p>\n
C\u00faltaca agus T\u00e9arnamh Fiontair le CloudSave<\/h2>\n
Is f\u00e9idir le bainisti\u00fa scripteanna bhlaosc saincheaptha le haghaidh archive_command<\/code>, l\u00e1imhse\u00e1il d\u00eddh\u00fabl\u00e1la WAL, agus st\u00f3r\u00e1il shl\u00e1n lasmuigh den l\u00e1ithre\u00e1n le haghaidh loga\u00ed idirbhirt a bheith ina ualach oibr\u00edochta\u00fail go tapa d’fhoirne TF.<\/p>\n
Seo an \u00e1it a sol\u00e1thra\u00edonn CloudSave luach suntasach do thimpeallachta\u00ed fiontair PostgreSQL. Comhth\u00e1tha\u00edonn CloudSave go d\u00edreach le APIanna c\u00faltaca agus cartlannaithe WAL d\u00fachasacha PostgreSQL chun na gaist\u00ed l\u00e1imhe a pl\u00e9adh thuas a dh\u00edchur.<\/p>\n
In ionad scripteanna bash leochaileacha a scr\u00edobh, sol\u00e1thra\u00edonn CloudSave comhth\u00e1th\u00fa l\u00e1idir, bunaithe ar ghn\u00edomhaire n\u00f3 gan ghn\u00edomhaire a:
\n* R\u00e1tha\u00edonn Seachadadh:<\/strong> Cuireann s\u00e9 orduithe bhlaosc caighde\u00e1nacha in ionad aistrithe f\u00edoraithe, seicshuim-bhail\u00edochtaithe chuig st\u00f3r\u00e1il shl\u00e1n lasmuigh den l\u00e1ithre\u00e1n n\u00f3 sa scamall.
\n* Cosc ar Bloat WAL:<\/strong> D\u00e9anann s\u00e9 monat\u00f3ireacht ghn\u00edomhach ar an gcomhadlann pg_wal<\/code> agus tugann s\u00e9 fol\u00e1ireamh do riarth\u00f3ir\u00ed i bhfad sula dtarla\u00edonn \u00eddi\u00fa deighilte.
\n* Uathoibr\u00edonn PITR:<\/strong> Simpl\u00edonn s\u00e9 T\u00e9arnamh go Pointe Ama tr\u00ed chomh\u00e9adan iomasach. Roghna\u00edonn t\u00fa an n\u00f3im\u00e9ad cruinn ar mhaith leat t\u00e9arnamh chuige, agus aisghabhann CloudSave an c\u00faltaca bonn ceart go huathoibr\u00edoch agus srutha\u00edonn s\u00e9 an seicheamh cruinn de chomhaid WAL a theasta\u00edonn chun an staid sin a bhaint amach.
\n* L\u00e1imhse\u00e1lann Aml\u00ednte:<\/strong> Bainist\u00edonn s\u00e9 stair aml\u00edne PostgreSQL go cliste, ag cinnti\u00fa nach nd\u00e9anann teipeanna agus c\u00e1sanna scoilte-inchinne do st\u00f3r c\u00faltaca a thruailli\u00fa.<\/p>\n
Tr\u00ed an t-ualach trom a bhaineann le bainist\u00edocht WAL a dh\u00edlucht\u00fa chuig CloudSave, is f\u00e9idir le DBAnna d\u00edri\u00fa ar bharrfheabhs\u00fa ceisteanna agus feidhm\u00edocht bunachar sonra\u00ed, agus fios acu go bhfuil a SLAanna RPO agus RTO cosanta ag ard\u00e1n ar ghr\u00e1d fiontair.<\/p>\n
Concl\u00faid<\/h2>\n
Is \u00e9 cartlann\u00fa WAL PostgreSQL cn\u00e1mh droma an t\u00e9arnaimh \u00f3 thubaiste bunachar sonra\u00ed. C\u00e9 go bhfuil an coincheap maidir le comhad a ch\u00f3ipe\u00e1il \u00f3 chomhadlann amh\u00e1in go ceann eile simpl\u00ed, crutha\u00edonn na c\u00e1sanna imeallacha\u2014teipeanna ci\u00faine, \u00eddi\u00fa diosca, agus \u00e9ags\u00falacht aml\u00edne\u2014riosca\u00ed tromch\u00faiseacha d’ionracas sonra\u00ed.<\/p>\n
Tr\u00ed ailtireacht pg_wal<\/code> a thuiscint, tr\u00ed chumra\u00edochta\u00ed archive_command<\/code> millteach a sheachaint go docht, monat\u00f3ireacht a dh\u00e9anamh ar pg_stat_archiver<\/code>, agus leas a bhaint as ard\u00e1in ch\u00faltaca fiontair cos\u00fail le CloudSave, is f\u00e9idir leat bonneagar PostgreSQL athl\u00e9imneach a th\u00f3g\u00e1il at\u00e1 in ann maireacht\u00e1il tr\u00ed theipeanna crua-earra\u00ed, earr\u00e1id\u00ed daonna, agus briseadh tubaisteach gan idirbheart tiomanta amh\u00e1in a chailleadh.<\/p>\n
\n
Faigh amach na gaist\u00ed coitianta a bhaineann le cartlann\u00fa WAL PostgreSQL a fh\u00e1gann go gcailltear sonra\u00ed. Foghlaim dea-chleachtais saineolaithe DBA, leideanna cumra\u00edochta, agus conas T\u00e9arnamh go Pointe Ama (PITR) iontaofa a chinnti\u00fa do bhunachair sonra\u00ed fiontair.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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