{"id":183001,"date":"2026-08-15T10:53:29","date_gmt":"2026-08-15T08:53:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/v-systemd-journald-spustya-6-let-priznali-problemu-izbytochnoj-nagruzki-na-nakopiteli"},"modified":"2026-08-15T10:53:32","modified_gmt":"2026-08-15T08:53:32","slug":"systemd-journald-acknowledges-excessive-disk-load-problem-after-6-years","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/systemd-journald-acknowledges-excessive-disk-load-problem-after-6-years","title":{"rendered":"\u00cen systemd-journald, dup\u0103 6 ani, s-a recunoscut problema suprasarcinii pe stocare","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dezvoltatorii proiectului systemd au \u00eenceput s\u0103 studieze \u0219i s\u0103 rezolve o veche problem\u0103 arhitectural\u0103 \u00een componenta <systemd-journald>, care duce la o cre\u0219tere semnificativ\u0103 a volumului datelor scrise pe disc (scriere amplificat\u0103) comparativ cu volumul real de jurnale. <\/p>\n

Povestea \u00eencepe din martie 2020, c\u00e2nd \u00een sistemul de urm\u0103rire a erorilor a fost \u00eenregistrat un raport, \u00een care s-a demonstrat c\u0103 generarea a aproximativ 500 KB de jurnale de text duce la mai mult de 700 MB de opera\u021biuni fizice de scriere pe SSD. Dezvoltatorii systemd au refuzat s\u0103 recunoasc\u0103 problema, au r\u0103spuns cu stilul <nu \u00een\u021belege\u021bi cum func\u021bioneaz\u0103 sistemele de fi\u0219iere>, au refuzat s\u0103 fac\u0103 profilare \u0219i au \u00eenchis cererea cu verdictul <not actionable>. Comentariile dezvoltatorilor au adunat sute de evalu\u0103ri negative din partea utilizatorilor, dar pozi\u021bia proiectului a r\u0103mas ferm\u0103. <\/p>\n

La \u00eenceputul anului 2026, a fost trimis un raport re\u00eentors despre problem\u0103, \u00een cadrul c\u0103ruia un dezvoltator independent, ValdikSS, a efectuat o profilare detaliat\u0103 folosind cgroup-uri izolate \u0219i dispozitive loop, demonstr\u00e2nd clar mecanismul care provoac\u0103 problema: din cauza utiliz\u0103rii fi\u0219ierelor mapate \u00een memorie (mmap) \u0219i a tabelelor hash binare, scrierea chiar \u0219i a unui singur mesaj text de 750 de octe\u021bi duce la modificarea amprentelor \u00een memorie, provoc\u00e2nd scrierea pe disk a unor pagini complete de 4 KB \u0219i generarea a \u00eentre 50 \u0219i 70 KB de opera\u021biuni de intrare\/ie\u0219ire la nivel de dispozitiv de bloc. <\/p>\n

Dup\u0103 ce raportul despre problem\u0103 a ajuns ieri pe prima pagin\u0103 a Hacker News \u0219i a fost publicat\u0103 o serie de teste sintetice concludente, mentenan\u021bii proiectului \u0219i-au schimbat retorica \u0219i au \u00eenceput lucrul la optimizarea mecanismelor de desc\u0103rcare a memoriei cache \u0219i a structurii de stocare a indicilor journald.
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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