Debunking Zswap ndi Zram Myths

Chiyambi: Kuyeretsa Mpweya pa Linux Memory Management

Poyesetsa kosalekeza kuchita bwino kwambiri, makamaka m'malo okonda kwambiri zinthu monga zotengera mitambo, makina owoneka bwino, ndi malo ogwirira ntchito, oyang'anira Linux ndi opanga madivelopa akukonza makina awo mosalekeza. Zida ziwiri zamphamvu zomwe nthawi zambiri zimalowa muzokambirana ndi Zswap ndi Zram. Ngakhale ali matekinoloje ogwirizana omwe cholinga chake ndi kuchepetsa kupanikizika kwa kukumbukira, chifunga chamalingaliro olakwika chimawazungulira. Kumvetsetsa chowonadi ndikofunikira, chifukwa kusasinthika kungayambitse kutsika kwa magwiridwe antchito m'malo mopindula. Monga momwe mabizinesi amtundu wa OS ngati Mewayz amadalira njira zomveka bwino, zomveka bwino kuti ziwongolere magwiridwe antchito, makina anu a Linux amadalira kumvetsetsa bwino kwa zigawo zake zazikulu kuti ziyende bwino. Tiyeni tifotokoze nthano zodziwika bwino za Zswap ndi Zram.

Nthano 1: Zram ndi Zswap Ndi Zomwezo

Izi mwina ndiye malingaliro olakwika omwe afala kwambiri. Ngakhale matekinoloje onsewa amagwiritsa ntchito kuponderezana kuti athetse kuchepa kwa kukumbukira, mapangidwe awo ndi maudindo awo ndi osiyana. Zram, yomwe poyamba inkatchedwa "compressed cache for memory," imapangachida chokhazikika, choponderezedwa mu RAM. Dongosolo likafuna kusinthana, limagwiritsa ntchito chipangizo cha zram m'malo (kapena kale) kulembera fayilo yosintha pang'onopang'ono ya disk. Kuponderezana ndi kutsika kumachitika mu kukumbukira kwathunthu, komwe kumathamanga kwambiri kuposa disk I/O.

Zswap, kumbali ina, imakhala ngatichosungira chakutsogolo kwa chipangizo chosinthira thupi (monga fayilo yosinthira pa SSD). Tsamba likasinthidwa kuti lisinthidwe, Zswap amayesa kukanikiza koyamba. Ngati kukanikiza kuli bwino, tsambalo limasungidwa mu dziwe lokumbukira lodzipereka. Pokhapokha ngati dziwe la Zswap liri lodzaza kapena tsamba silingagwirizane ndizomwe zimalembedwa ku disk yosinthana. Ganizirani za Zram ngati disk yodzipatulira, yothamanga kwambiri ya RAM yosinthira, pomwe Zswap ndi yanzeru, yosungira kukumbukira pakusintha kwanu kotengera disk.

Nthano 2: Kuthandizira Zram kapena ZSwap Nthawi Zonse Kumayendetsa Bwino

Ndikuyesa kuganiza kuti kuonjezera wosanjikiza woponderezedwa nthawi zonse kumapangitsa kuti liwonjezeke, koma ichi sichowonadi chapadziko lonse lapansi. Kupindula kwa magwiridwe antchito kumadalira kwambiri kuchuluka kwa ntchito yanu ndi hardware. Kugulitsa kwakukulu kuli pakati pakuzungulira kwa CPU ndi I/O latency. Kupondereza ndi kutsitsa deta kumafuna mphamvu ya CPU.

• Mawonekedwe Opindulitsa: Pa makina omwe ali ndi ma CPU othamanga koma RAM yochepa kapena kusungirako pang'onopang'ono (monga eMMC kapena HDD), mtengo wopondereza ndi wotsika kwambiri kuposa chilango cha disk I/O. Izi ndizofala m'mabokosi opepuka, makina enieni, ndi ma laputopu akale.
• Zovuta Zomwe Zingachitike: Pa makina omwe ali ndi RAM yochuluka yomwe sasinthana kawirikawiri, pamwamba pa ma aligorivimu ophatikizika ndi mtengo weniweni wopanda phindu. Momwemonso, ngati muli ndi NVMe SSD yothamanga kwambiri, kusiyana kwa magwiridwe antchito pakati pa kukanikizana kwa kukumbukira ndi disk I/O kumachepera, zomwe zimapangitsa kuti mwayi wa Zswap ukhale wocheperako.

Kukonzekera bwino dongosolo, mofanana ndi kukonza nsanja yosinthika monga Mewayz, kumafuna kumvetsetsa momwe mungagwiritsire ntchito m'malo mogwiritsa ntchito njira imodzi yokha.

Nthano 3: Muyenera Kugwiritsa Ntchito Zram ndi Zswap Together Kuti Mugwiritse Ntchito Kwambiri

Kusinthidwa uku sikungowonjezera; zingakhale zotsutsana. Kugwiritsa ntchito Zram ngati malo osinthira makina omwe alinso ndi Zswap kumapangitsa kuti ntchito ziziyenda bwino. Ingoganizirani tsamba likuchotsedwa pamtima: likanayamba kukanikizidwa mu dziwe la Zswap mu RAM, kuti lisunthidwenso mu chipangizo cha Zram, chomwe chilinso mu RAM. Izi zimawonjezera zovuta zosafunikira komanso kuchuluka kwa CPU popanda phindu lowoneka.

Mfungulo ndikusankha chida choyenera pantchitoyo: gwiritsani ntchito Zram mukafuna njira yosinthira yosunga kukumbukira, ndipo gwiritsani ntchito Zswap mukafuna kufulumizitsa kukhazikitsa kosintha komwe kulipo pa disk. Ndi njira zina, osati zowonjezera.

Njira yothandiza kwambiri ndikusankha imodzi motengera mbiri yanu. Zram ndiyabwino pamakina omwe mukufuna kupewa kusinthana kwa disk kwathunthu. Zswap ndiyabwino pamakina omwe kugawanika kwakuthupi kulipo koma mukufuna kuchepetsa kugwiritsidwa ntchito kwake.

Nthano 4: Matekinoloje Awa Ndi A Makina Osakumbukira Kwambiri

Ngakhale ndizowona kuti Zram idatchuka pazida zomwe zili ndi RAM yochepa, monga Raspberry Pis ndi Chromebooks otsika, kugwiritsa ntchito kwake kumapitilira kutali. Mu zomangamanga zamakono, kuchita bwino ndikofunikira. Pamalo okhala ndi kachulukidwe kwambiri, monga omwe amayendetsedwa ndi nsanja ngati Mewayz, kugwiritsa ntchito bwino kukumbukira kumatanthawuza kupulumutsa mtengo komanso kachulukidwe kakang'ono. Pogwiritsa ntchito Zram, mutha kupitilira kukumbukira bwino, kulola kuti ntchito zambiri zizigwira ntchito pagulu limodzi popanda kuyambitsa kusintha kwapang'onopang'ono kwa disk. Sizongokhalira kupulumuka ndi RAM yochepa; ndi za kukhathamiritsa kugwiritsa ntchito zinthu kuti mukwaniritse zambiri ndi zomwe muli nazo. Mfundo iyi yowonjeza kuchita bwino kwambiri kuchokera pazigawo zazikuluzikulu zanu ndi yofunika kwambiri pa Linux kernel monga momwe zilili pamachitidwe abizinesi anthawi zonse opangidwa kuti aziwongolera mayendedwe ovuta.

Mafunso Ofunsidwa Kawirikawiri

Chiyambi: Kuyeretsa Mpweya pa Linux Memory Management

Poyesetsa kosalekeza kuchita bwino kwambiri, makamaka m'malo okonda kwambiri zinthu monga zotengera mitambo, makina owoneka bwino, ndi malo ogwirira ntchito, oyang'anira Linux ndi opanga madivelopa akukonza makina awo mosalekeza. Zida ziwiri zamphamvu zomwe nthawi zambiri zimalowa muzokambirana ndi Zswap ndi Zram. Ngakhale ali matekinoloje ogwirizana omwe cholinga chake ndi kuchepetsa kupanikizika kwa kukumbukira, chifunga chamalingaliro olakwika chimawazungulira. Kumvetsetsa chowonadi ndikofunikira, chifukwa kusasinthika kungayambitse kutsika kwa magwiridwe antchito m'malo mopindula. Monga momwe mabizinesi amtundu wa OS ngati Mewayz amadalira njira zomveka bwino, zomveka bwino kuti ziwongolere magwiridwe antchito, makina anu a Linux amadalira kumvetsetsa bwino kwa zigawo zake zazikulu kuti ziyende bwino. Tiyeni tifotokoze nthano zodziwika bwino za Zswap ndi Zram.

Nthano 1: Zram ndi Zswap Ndi Zomwezo

Izi mwina ndiye malingaliro olakwika omwe afala kwambiri. Ngakhale matekinoloje onsewa amagwiritsa ntchito kuponderezana kuti athetse kuchepa kwa kukumbukira, mapangidwe awo ndi maudindo awo ndi osiyana. Zram, yomwe kale inkatchedwa "compressed cache for memory," imapanga chipangizo chokhazikika, chokhazikika mu RAM. Dongosolo likafuna kusinthana, limagwiritsa ntchito chipangizo cha zram m'malo (kapena kale) kulembera fayilo yosintha pang'onopang'ono ya disk. Kuponderezana ndi kutsika kumachitika mu kukumbukira kwathunthu, komwe kumathamanga kwambiri kuposa disk I/O.

Nthano 2: Kuthandizira Zram kapena Zswap Nthawi Zonse Kumathandiza Kuchita bwino

Ndikuyesa kuganiza kuti kuonjezera wosanjikiza woponderezedwa nthawi zonse kumapangitsa kuti liwonjezeke, koma ichi sichowonadi chapadziko lonse lapansi. Kupindula kwa magwiridwe antchito kumadalira kwambiri kuchuluka kwa ntchito yanu ndi hardware. Kugulitsa kwakukulu kuli pakati pa CPU kuzungulira ndi I/O latency. Kupondereza ndi kutsitsa deta kumafuna mphamvu ya CPU.

Nthano 3: Muyenera Kugwiritsa Ntchito Zram ndi Zswap Together Kuti Mugwiritse Ntchito Kwambiri

Kusinthidwa uku sikungowonjezera; zingakhale zotsutsana. Kugwiritsa ntchito Zram ngati malo osinthira makina omwe alinso ndi Zswap kumapangitsa kuti ntchito ziziyenda bwino. Ingoganizirani tsamba likuchotsedwa pamtima: likanayamba kukanikizidwa mu dziwe la Zswap mu RAM, kuti lisunthidwenso mu chipangizo cha Zram, chomwe chilinso mu RAM. Izi zimawonjezera zovuta zosafunikira komanso kuchuluka kwa CPU popanda phindu lowoneka.

Nthano 4: Matekinoloje Awa Ndi A Makina Osakumbukira Kwambiri

Ngakhale ndizowona kuti Zram idatchuka pazida zomwe zili ndi RAM yochepa, monga Raspberry Pis ndi Chromebooks otsika, kugwiritsa ntchito kwake kumapitilira kutali. Mu zomangamanga zamakono, kuchita bwino ndikofunikira. Pamalo okhala ndi kachulukidwe kwambiri, monga omwe amayendetsedwa ndi nsanja ngati Mewayz, kugwiritsa ntchito bwino kukumbukira kumatanthawuza kupulumutsa mtengo komanso kachulukidwe kakang'ono. Pogwiritsa ntchito Zram, mutha kupitilira kukumbukira bwino, kulola kuti ntchito zambiri zizigwira ntchito pagulu limodzi popanda kuyambitsa kusintha kwapang'onopang'ono kwa disk. Sizongokhalira kupulumuka ndi RAM yochepa; ndi za kukhathamiritsa kugwiritsa ntchito zinthu kuti mukwaniritse zambiri ndi zomwe muli nazo. Mfundo iyi yowonjeza kuchita bwino kwambiri kuchokera pazigawo zazikuluzikulu zanu ndi yofunika kwambiri pa Linux kernel monga momwe zilili pamachitidwe abizinesi anthawi zonse opangidwa kuti aziwongolera mayendedwe ovuta.