Ajiye rarrabuwar VPN a cache, riƙe shekarunta a bayyane
Lura, sabo da amsar shafinka suna tsufa da sauri daban-daban. Idan aka ware su, rarrabuwar da aka ajiye tana da gaskiya game da abin da ta sani.
Rarrabuwar da aka ajiye a cache tana ceton bincike ɗaya kuma tana daskare ra'ayin jiya cikin shawarar yau. Ainihin kwatancen ba cache ne da rashin cache ba: lura ne, sabonsa da amsar da shafinka ya zaɓa. Idan ka rasa iyaka tsakanin waɗannan uku, ingantawa zai fara yin manufa da kansa. Gyaran shine lissafin kuɗi, ba ingantaccen feed ba.
Bayanai uku da agogo uku daban-daban
Lura shine filin da ka karɓa, feed ɗin da ya fito daga gare shi da sigar bayanan da ke bayansa. Sabo dabi'a ce ta shigarwar cache: lokacin da binciken ya gudana, lokacin da ba a amince da shigarwar ba, da ko sabuntawa ta ƙarshe ta dawo da wani abu. Amsa ita ce abin da shafinka ke yi game da shi don wannan buƙatar, wannan asusu ko wannan aikin. Masu daban-daban ne ke samar da su kuma suna lalacewa da sauri daban-daban, shi ya sa layi ɗaya mai suna blocked ke lalata bambancin.
| Record | Who owns it | How long it should live | Damage when it is folded into another row |
|---|---|---|---|
| The observation | the feed's operator | until a newer dataset version replaces it | a stale lookup becomes indistinguishable from a fresh one |
| Its freshness | the application | one request's tolerance for age | a failed refresh hides behind a cache hit |
| The response | whoever owns the site policy | until that policy is reviewed | a feed outage turns into an indefinite block |
Agogo biyu sun cancanci kulawa ta musamman. Lokacin da bincikenka ya gudana ba shine lokacin da mai bayarwa ya wallafa bayanan ba, kuma mai aiki da zai karanta layin daga baya yana bukatar ya san daga wanne cikin biyun kowace ƙima ta fito. Saita ƙarewa da sabuntawa bisa tsarin sabunta feed ɗin da aka rubuta da kuɗin yin kuskure, ba bisa lambar da aka aro daga wani shafi ba.
Riƙe filin, ba hukunci ba
Takardun MaxMind game da IP marasa suna misali ne na zahiri na feed da ke raba VPN mara suna, mai ba da hosting, proxy na jama'a da fitowar Tor cikin filaye daban-daban. Ya kuma rubuta cewa ƙaramin cibiyar sadarwar VPN da ba a yi rajista ba na iya fitowa a ƙarƙashin tutar hosting maimakon. Mayar da wannan zuwa boolean ɗaya yana watsar da kashi ɗaya tilo da mai aiki zai iya dubawa daga baya.
Babu wata hanya ta hasashe da ta tsaya lafiya. Alamar hosting ba ta tabbatar da an yi amfani da rami ba, kuma rashin tutar VPN ba ta tabbatar da babu wani abu tsakanin abokin ciniki da sabis ɗinka ba. Waɗannan da'awa biyu ne daban-daban, kuma boolean ɗaya ba zai iya bayyana ko ɗaya daga cikinsu ba.
Haɗa shigarwar da adireshin da ka tabbatar
Bayan proxy mai juyawa, aikace-aikacen dole ya yi amfani da yadda ake kula da adireshin abokin ciniki da turawar ta amince da shi. Kowane taken turawa da mai kira ya bayar ba zai taɓa iya zaɓar sunan da aka ajiye na wani ba.
Wannan gazawa kuskure ne na daidaito da na tsaro a lokaci ɗaya, domin mai hari da ke sarrafa taken zai iya gado da shigarwar da aka amince da ita ko ya lika wanda aka yi wa hari ga wata mara kyau. Fitar da maɓalli daga haɗin da naka infaɗasture ya ƙare, kuma rubuta wace fitarwa aka yi amfani da ita. Idan proxy da yawa suna gaba, rubuta sarkar maimakon amincewa da taken farko da ya yi kama da gaskiya. Idan sarkar ba ta bayyana ba, yi log ɗin maɓallin da aka fitar da taken da ka ƙi, domin na biyun ne bitar aukuwa za ta tambaya.
Rashin shaida ba sakamako mai tsabta ba ne
Ƙarewar lokaci, gurɓataccen amsa da bayanan da ba su samuwa kowanne yana nufin wani abu dabam da binciken da ya yi nasara wanda bai dace da kome ba. Ka nuna su a matsayin sakamako daban-daban, kuma ka yanke shawara tun da wuri abin da aikin da aka kare zai yi idan babu wata shaida kwata-kwata. Shafi mai karatu kawai da aikin asusun da aka shiga na iya bin ka'idoji daban-daban a can.
Riƙe ingantaccen tabbatarwa, ko neman tabbaci da ake goyon baya, yawanci amsa ce mafi kyau fiye da ɗaukar katsewa a matsayin izini na gama gari ko haramci ga dukan shafi. Iyakance tsawon lokacin da bincike zai iya gudana kuma ka dakatar da guguwar sabuntawa da duk hanyar da haɗin gwiwar ke goyon baya. Idan ana amfani da tsohuwar ƙima yayin katsewa, yi mata alama a matsayin tsohuwa a wurin yanke shawara, kuma ka nuna gazawar ƙarshe ta sabuntawa a bayyane domin dogon lahani ba zai iya wuce a matsayin shigarwa mai lafiya ba. Ko wane zaɓi, rubuta shi inda ake aiwatar da manufar ba a cikin sharhi kusa da binciken ba.
Riƙewa na cikin wannan shawara: riƙe filayen da wannan aikin ke buƙata da sawun bita da ke bayansu, ba ƙari ba. Cache na IP ba dole ba ne ya zama tarihin bincike.
Karɓi shari'o'i huɗu, ciki har da gyara
Gwada sabon sakamako, sakamakon da ya ƙare, binciken da ya kasa da rarrabuwar da aka gyara daga baya. Kowanne yana gwada reshe daban, kuma na ƙarshe ne kawai ke nuna ko za a iya soke hani da aka yi kuskure.
Sannan tabbatar cewa talaka na da hanyar neman bita bayan an toshe shi bisa kuskure, domin feed ɗin zai yi kuskure wani lokaci kuma layin yana cikin zane. Rubuta shari'o'in huɗu a cikin runbook tare da sunan mai manufar. Zanen yana samun matsayinsa idan ya cire binciken da ba dole ba yayin da yake riƙe rashin tabbas a raye kuma shawarar a bayyane tana hannun mutum.