Menghitung Disk Cache (cache_dir) pada Squidproxy

[chaer.newbie]

1. Gunakan 80% dari ukuran disk sebagai ruang penyimpanan cache
2. Pada squid, disk cache di definisikan dengan tag “cache_dir”. adapun format defaultnya adalah : “cache_dir Type Directory-Name Mbyte L1 L2 [options]”

keterangan:

1. cache_dir adalah tag yang mendefinisikan directory cache.
2. Type adalah jenis penyimpanan sistem, defaultnya adalah ufs. jika akan menggunakan sistem penyimpanan jenis lain seperti diskd atau aufs maka perlu menambah options –enable-storeio=”diskd, aufs” ketika mengkompile squid.
3. Directory-Name adalah menunjukkan letak directory akan di buat cache misalkan /cache. ingat, owner dan group directory ini harus sesuai dengan user yang menjalankan squid. adalah sebuah larangan squid di jalankan dengan user root.
4. Mbyte (numeric) adalah pendifinisian besarnya media penyimpanan yang akan di gunakan cache, misalkan yang akan di gunakan adalah 40GB maka pada Mbyte harus tertulis 20000, MByte ini akan berhubungan dengan tag lain yaitu “cache_swap_low 90″ dan “cache_swap_high 95″.
5. L1 (numeric) adalah jumlah directory yang akan di buat di dalam directory /cache ketika perintah #/usr/local/sbin/squid -z di eksekusi.
6. L2 (numeric) adalah jumlah directory yang akan di buat di dalam masing-masing directory L1 ketika perintah #/usr/local/sbin/squid -z di eksekusi.



Lalu bagaimana menentukan L1 ?, berikut adalah rumus yang di pakai.

((( x / y ) / 256 ) / 256 ) * 2 ≈ L1
x = besarnya disk cache yang akan di gunakan, satuannya adalah Kb (40 GB = 40.000.000 KB) *biar cepet
y = jumlah rata-rata object biasanya bernilai 13Kb
misalkan besarnya cache disk adalah 20 GB maka:

(((20.000.000/13)/256)/256)*2 ≈ 47 (dibulatkan kepantat)

Maka nilai L1 adalah 47.


jadi hasilnya bilang menggunakan cache 20 GB

cache_dir aufs /proxy 20000 47 256

[ketek]

1. Gunakan 80% dari ukuran disk sebagai ruang penyimpanan cache
er jelasin dong ngapa cuma 80 % yg kudu dipake

[chaer.newbie]

(11-26-2011 01:27 PM)ketek Wrote:  1. Gunakan 80% dari ukuran disk sebagai ruang penyimpanan cache
er jelasin dong ngapa cuma 80 % yg kudu dipake

wah kenapa yyah gw juga bingung,

kayaknya 20 % 30% sih bebas tergantung ngadminnya
yang ga boleh ngelebihin 80% kayaknya menghindari terjadinya keresh.. :

gitu kali yak. gw juga ga tau soalnya

[ketek]

wkwkkw biar gak dibilang hoax, ni om

Let's see an example: you have a 9Gb disk (these times they're even hard to find..). First thing, manifacturers often lie about disk capacity (the whole Megabyte vs Mebibyte issue), and then the OS needs some space for its accounting structures, so you'll reasonably end up with 8Gib of useable space. You then have to account for another 10% in overhead for Squid, and then the space needed for keeping fragmentation at bay. So in the end the recommended cache_dir setting is 6000 to 7000 Mebibyte.
http://wiki.squid-cache.org/SquidFaq/Con...d_I_use.3F

[chaer.newbie]

(11-26-2011 02:16 PM)ketek Wrote:  wkwkkw biar gak dibilang hoax, ni om

Let's see an example: you have a 9Gb disk (these times they're even hard to find..). First thing, manifacturers often lie about disk capacity (the whole Megabyte vs Mebibyte issue), and then the OS needs some space for its accounting structures, so you'll reasonably end up with 8Gib of useable space. You then have to account for another 10% in overhead for Squid, and then the space needed for keeping fragmentation at bay. So in the end the recommended cache_dir setting is 6000 to 7000 Mebibyte.
http://wiki.squid-cache.org/SquidFaq/Con...d_I_use.3F

wah iyak berarti bener kalo harus dibawah 80% menghindari terjadinya keresh kwakkwaoakwokao analisa gw emang hebat

[74jTeZ]

(11-26-2011 02:24 PM)chaer.newbie Wrote:  

(11-26-2011 02:16 PM)ketek Wrote:  wkwkkw biar gak dibilang hoax, ni om

Let's see an example: you have a 9Gb disk (these times they're even hard to find..). First thing, manifacturers often lie about disk capacity (the whole Megabyte vs Mebibyte issue), and then the OS needs some space for its accounting structures, so you'll reasonably end up with 8Gib of useable space. You then have to account for another 10% in overhead for Squid, and then the space needed for keeping fragmentation at bay. So in the end the recommended cache_dir setting is 6000 to 7000 Mebibyte.
http://wiki.squid-cache.org/SquidFaq/Con...d_I_use.3F

wah iyak berarti bener kalo harus dibawah 80% menghindari terjadinya keresh kwakkwaoakwokao analisa gw emang hebat

omz cheran emang hebat..

[mariachi]

(11-26-2011 02:24 PM)chaer.newbie Wrote:  

(11-26-2011 02:16 PM)ketek Wrote:  wkwkkw biar gak dibilang hoax, ni om

Let's see an example: you have a 9Gb disk (these times they're even hard to find..). First thing, manifacturers often lie about disk capacity (the whole Megabyte vs Mebibyte issue), and then the OS needs some space for its accounting structures, so you'll reasonably end up with 8Gib of useable space. You then have to account for another 10% in overhead for Squid, and then the space needed for keeping fragmentation at bay. So in the end the recommended cache_dir setting is 6000 to 7000 Mebibyte.
http://wiki.squid-cache.org/SquidFaq/Con...d_I_use.3F

wah iyak berarti bener kalo harus dibawah 80% menghindari terjadinya keresh kwakkwaoakwokao analisa gw emang hebat

palingan tadi jawabnya ngasal aja

[Matmund Newbie]

(11-26-2011 02:24 PM)chaer.newbie Wrote:  wah iyak berarti bener kalo harus dibawah 80% menghindari terjadinya keresh kwakkwaoakwokao analisa gw emang hebat

tambah sempurna aja kegantengan ente.. moga cepet laku mas bro..

[Rev Aris]

(11-26-2011 09:53 PM)t3k0 Wrote:  

(11-26-2011 02:24 PM)chaer.newbie Wrote:  

(11-26-2011 02:16 PM)ketek Wrote:  wkwkkw biar gak dibilang hoax, ni om

Let's see an example: you have a 9Gb disk (these times they're even hard to find..). First thing, manifacturers often lie about disk capacity (the whole Megabyte vs Mebibyte issue), and then the OS needs some space for its accounting structures, so you'll reasonably end up with 8Gib of useable space. You then have to account for another 10% in overhead for Squid, and then the space needed for keeping fragmentation at bay. So in the end the recommended cache_dir setting is 6000 to 7000 Mebibyte.
http://wiki.squid-cache.org/SquidFaq/Con...d_I_use.3F

wah iyak berarti bener kalo harus dibawah 80% menghindari terjadinya keresh kwakkwaoakwokao analisa gw emang hebat

palingan tadi jawabnya ngasal aja

wakakakakak
surim

[lonely.army]

250 G jd berapa jumlah space yg harus di bikin untuk capchay nya? klo 7500 sie bisananya dikasih kerupuk wkwkwkw kabooooooorrrrrrrrrrr