Alohaʻoe!
Pau nā moʻolelo maikaʻi a pau. A ʻo kā mākou moʻolelo e pili ana i ka hiki ʻana mai o kahi hopena e hala koke i ka Pā ahi Kina. No laila, wikiwiki au e haʻi aku iā ʻoe i ka mea hope loa, ka hapa hope ma keia kumuhana.
Ma ka ʻāpana mua ua kamaʻilio mākou e pili ana i nā papa hoʻāʻo he nui a mākou i hana ai a me nā hopena i hāʻawi ʻia. A ua hoʻoholo mākou i ka mea maikaʻi e hoʻohui CDN! no ka viscosity i loko o kā mākou papahana.
E haʻi wau iā ʻoe pehea mākou i hoʻāʻo ai iā Alibaba Cloud CDN, Tencent Cloud CDN a me Akamai, a me ka mea a mākou i hoʻopau ai. A ʻoiaʻiʻo, e hōʻuluʻulu kākou.
Alibaba Cloud CDN
Hoʻokipa ʻia mākou ma Alibaba Cloud a hoʻohana iā IPSEC a me CEN mai lākou. Pono e ho'āʻo mua i kā lākou hoʻonā.
He ʻelua ʻano huahana ʻo Alibaba Cloud i kūpono iā mākou: CDN и DCDN. ʻO ka koho mua he CDN maʻamau no kahi kikowaena kikoʻī (subdomain). ʻO ke koho ʻelua ke kū nei ʻO ke ala ala no CDN (Kahea wau ia CDN dynamic), hiki ke hoʻohana ʻia i ke ʻano piha piha (no ka wildcard domains), hoʻopaʻa ʻia hoʻi ia i ka ʻikepili static a hoʻolalelale i ka ʻike ikaika iā ia iho, ʻo ia hoʻi, e hoʻouka ʻia ka dynamics o ka ʻaoʻao ma o ka mea hoʻolako. nā pūnaewele wikiwiki. He mea koʻikoʻi kēia no mākou, no ka mea, ʻoi aku ka ikaika o kā mākou pūnaewele, hoʻohana ia i nā subdomains he nui, a ʻoi aku ka maʻalahi o ka hoʻonohonoho ʻana i kahi CDN i hoʻokahi manawa no ka "asterisk" - *.semrushchina.cn.
Ua ʻike mua mākou i kēia huahana i nā pae mua o kā mākou papahana Kina, akā ʻaʻole ia e hana, a ua hoʻohiki nā mea hoʻomohala e loaʻa koke ka huahana i nā mea kūʻai aku. A hana ʻo ia.
Ma DCDN hiki iā ʻoe:
- hoʻonohonoho i ka hoʻopau SSL me kāu palapala hōʻoia,
- hiki i ka wikiwiki o ka maʻiʻo dynamic,
- hoʻonohonoho maʻalahi i ka cache o nā faila static,
- holoi i ka huna huna,
- i mua i nā kumu pūnaewele,
- hiki ke hoʻoemi a me ka HTML Beautifier.
Ma keʻano laulā, ua like nā mea a pau me nā mākua a me nā mea hoʻolako CDN nui.
Ma hope o ka ʻōlelo ʻia ʻana o ka Origin (kahi e hele ai nā kikowaena lihi CDN), koe wale nō ka hana ʻana i kahi CNAME no ka asterisk, e kuhikuhi ana. all.semrushchina.cn.w.kunluncan.com (ua loaʻa kēia CNAME ma ka Alibaba Cloud console) a e hana ka CDN.
Ma muli o nā hopena hōʻike, ua kōkua nui kēia CDN iā mākou. Hōʻike ʻia nā ʻikepili ma lalo nei.
olelo hooholo
ʻO Uptime
Median
75 pakeneka
95 pakeneka
Cloudflare
86.6
18s
30s
60s
IPsec
99.79
18s
21s
30s
CEN
99.75
16s
21s
27s
CEN/IPsec + GLB
99.79
13s
16s
25s
Ali CDN + CEN/IPsec + GLB
99.75
10s
12.8s
17.3s
He hopena maikaʻi loa kēia, ʻoi aku ka maikaʻi inā hoʻohālikelike ʻoe iā lākou me nā helu i ka hoʻomaka. Akā ua ʻike mākou ʻo ka hoʻāʻo ʻana o ka polokalamu ʻAmelika o kā mākou pūnaewele www.semrush.com e holo ana mai USA ma ka awelika o 8.3s (kahi waiwai kokoke loa). Aia kahi wahi e hoʻomaikaʻi ai. Eia kekahi, aia kekahi mau mea hoʻolako CDN hoihoi e hoʻāʻo.
No laila, neʻe mālie mākou i kahi kanaka nunui ma ka mākeke Kina - Tencent.
Kapua Tencent
Ke hoʻomohala nei ʻo Tencent i kāna ao - hiki ke ʻike ʻia kēia mai kahi helu liʻiliʻi o nā huahana. I ka hoʻohana ʻana iā ia, makemake mākou e hoʻāʻo ʻaʻole wale i kā lākou CDN, akā pū kekahi i kā lākou ʻoihana pūnaewele holoʻokoʻa.
- Loaʻa iā lākou kekahi mea like me CEN?
- Pehea e hana ai ka IPSEC no lākou? He wikiwiki, he aha ka uptime?
- Loaʻa iā lākou Anycast?
E nānā kaʻawale kākou i kēia mau nīnau.
Analogue CEN
He huahana ko Tencent Pūnaehana Cloud Connect (), hiki iā ʻoe ke hoʻohui i nā VPC mai nā ʻāpana like ʻole, me nā wahi i loko a i waho o Kina. Aia ka huahana i loko o ka beta kūloko, a pono ʻoe e hana i kahi tikiki e noi ana e hoʻopili iā ia. Ua aʻo mākou mai ke kākoʻo ʻana ʻaʻole hiki i nā moʻolelo honua (ʻaʻole mākou e kamaʻilio e pili ana i nā kamaʻāina Kina a i ʻole nā hui kānāwai) ke komo i ka papahana hoʻāʻo beta a, ma ka laulā, hoʻohui i kahi ʻāina i loko o Kina me kahi ʻāina ma waho. 1-0 ma ke alo o Ali Cloud
IPSEC
ʻO ka ʻāina hema loa o Tencent Guangzhou. Ua hōʻuluʻulu mākou i kahi tunnel a hoʻopili iā ia i ka ʻāina ʻo Hong Kong ma GCP (a laila ua loaʻa mua kēia ʻāina). Ua hoʻokiʻekiʻe ʻia ka lua o Ali Cloud mai Shenzhen a i Hong Kong i ka manawa like. Ua ʻike ʻia ma o ka pūnaewele Tencent ʻoi aku ka maikaʻi o ka latency i Hong Kong (10ms) ma mua o Shenzhen a i Hong Kong a i Ali (120ms - he aha?). Akā ʻaʻole kēia i wikiwiki i ka hana o ka pūnaewele i manaʻo ʻia e hana ma o Tencent a me kēia tunnel, ʻo ia iho he mea kupaianaha a hōʻoia hou i kēia: latency - no Kina ʻaʻole kēia he hōʻailona kūpono maoli. ka nānā ʻana i ka wā e hoʻomohala ai i kahi hoʻonā no ka hele ʻana i ka pā ahi Kina.
ʻO ka wikiwiki o ka Pūnaewele ʻo Anycast
ʻO kekahi huahana e hiki ai iā ʻoe ke hana ma o anycast IP . Akā ʻaʻole ia i loaʻa i nā moʻolelo honua, no laila ʻaʻole wau e haʻi iā ʻoe e pili ana i ia mea, akā ʻo ka ʻike ʻana aia paha kahi huahana e pono ai.
Akā ua hōʻike ka hōʻike CDN i kekahi mau hopena hoihoi. ʻAʻole hiki ke hoʻohana ʻia ka CDN o Tencent ma kahi pūnaewele piha, aia wale nō ma nā kikowaena kikoʻī. Ua hana mākou i nā kāʻei kapu a hoʻouna aku i nā kaʻa iā lākou:
Ua ʻike ʻia aia kēia CDN i kēia hana: ʻO ka hoʻonui ʻana i ke kaʻa kaʻa o nā palena ʻāina. Pono kēia hiʻohiʻona e hōʻemi i nā kumukūʻai ke hele ka huakaʻi ma ka pā ahi Kina. E like me Kinohi Ua kuhikuhi ʻia ka IP address o Google GLB (GLB anycast). No laila, makemake mākou e maʻalahi i ka hoʻolālā papahana.
Ua maikaʻi loa nā hopena - ma ke kiʻekiʻe o Ali Cloud CDN, a ma kekahi mau wahi ʻoi aku ka maikaʻi. He mea kupanaha kēia, no ka mea inā kūleʻa nā hoʻokolohua, hiki iā ʻoe ke haʻalele i kahi ʻāpana koʻikoʻi o ka ʻōnaehana, tunnels, CEN, nā mīkini virtual, etc.
ʻAʻole mākou i hauʻoli no ka lōʻihi, no ka mea, ua hōʻike ʻia kahi pilikia: ʻaʻole i hāʻule nā hoʻokolohua ma Catchpoint no ka mea hoʻolako pūnaewele ʻo China Mobile. Mai kēlā me kēia wahi i loaʻa iā mākou kahi manawa pau ma o Tencent's CDN. ʻAʻole i alakaʻi ʻia ka pilina me ke kākoʻo ʻenehana i kekahi mea. Ua ho'āʻo mākou e hoʻoponopono i kēia pilikia no kahi lā, akā ʻaʻohe mea i hana.
Aia wau ma Kina i kēlā manawa, akā ʻaʻole hiki ke loaʻa i ka Wi-Fi ākea ma ka pūnaewele o kēia mea hoʻolako e hōʻoia pono i ka pilikia. A i ʻole, ʻike wikiwiki a maikaʻi nā mea a pau.
Eia naʻe, ma muli o ka ʻoiaʻiʻo ʻo Kina Mobile kekahi o nā mea hoʻohana nui ʻekolu, ua koi ʻia mākou e hoʻihoʻi i ke kaʻa i Ali CDN.
Akā ʻo ka laulā, he hopena hoihoi kēia i kūpono i ka hoʻāʻo lōʻihi a me ka hoʻoponopono ʻana i kēia pilikia.
akamai
ʻO ka mea hoʻolako CDN hope loa a mākou i hoʻāʻo ai akamai. He mea hoʻolako nui kēia i loaʻa kāna pūnaewele ma Kina. ʻOiaʻiʻo, ʻaʻole hiki iā mākou ke hala.
Mai ka hoʻomaka ʻana, ua ʻae mākou me Akamai no kahi manawa hoʻokolokolo i hiki iā mākou ke hoʻololi i ka domain a ʻike pehea e hana ai ma kā lākou pūnaewele. E wehewehe wau i ka hopena o nā hoʻāʻo a pau ma ke ʻano o "Ka mea aʻu i makemake ai" a me "Ka mea aʻu i makemake ʻole ai," a e hāʻawi pū wau i nā hopena hōʻike.
Ka mea a'u i makemake ai:
- Ua kōkua nui nā kāne mai Akamai i nā nīnau āpau a hele pū me mākou i nā pae hoʻāʻo a pau. Ua ho'āʻo mau mākou e hoʻomaikaʻi i kekahi mea ma ko mākou ʻaoʻao. Hāʻawi lākou i nā ʻōlelo aʻoaʻo loea maikaʻi.
- Aia ʻo Akamai ma kahi o 10-15% lohi ma mua o kā mākou hopena ma o Ali Cloud CDN. ʻO ka mea kupaianaha ʻo ia ma Origin for Akamai ua kuhikuhi mākou i ka IP IP o GLB, ʻo ia hoʻi, ʻaʻole i hele ka huakaʻi i kā mākou hopena (hiki iā mākou ke haʻalele i kahi ʻāpana o ka ʻōnaehana). Akā naʻe, ua hōʻike nā hopena hōʻike ʻoi aku ka hewa o kēia hopena ma mua o kā mākou mana o kēia manawa (nā hopena hoʻohālikelike ma lalo).
- Ua hoʻāʻo ʻia ʻo Origin GLB a me Origin ma Kina. Ua like like nā koho ʻelua.
- he nui na Alanui Pono (ka hoʻopololei ʻana i ke ala ala). Hiki iā ʻoe ke hoʻokipa i kahi mea hoʻāʻo ma Origin, a e hoʻāʻo nā kikowaena Akamai Edge e kiʻi iā ia (GET maʻamau). No kēia mau noi, ua ana ʻia ka wikiwiki a me nā ana ʻē aʻe, e pili ana i ka ʻoihana Akamai e hoʻomaikaʻi i nā ala i ʻoi aku ka wikiwiki o ke kaʻa no kā mākou pūnaewele a ʻike maopopo ʻia ʻo ka hiki ʻana i kēia hiʻohiʻona ke hopena ikaika i ka wikiwiki o ka pūnaewele.
- Maikaʻi ka hoʻololi ʻana i ka hoʻonohonoho hoʻonohonoho ʻana ma ke kikowaena pūnaewele. Hiki iā ʻoe ke hana Compare no nā mana, e nānā i ka diff. Nānā i nā mana mua.
- Hiki iā ʻoe ke ʻōwili i kahi mana hou ma mua wale nō ma ka pūnaewele Akamai Staging - ʻo ka pūnaewele like me ka hana ʻana, ʻaʻole kēia ala e pili i nā mea hoʻohana maoli. No kēia hoʻāʻo, pono ʻoe e hoʻopunipuni i nā moʻolelo DNS ma kāu mīkini kūloko.
- ʻO ka wikiwiki loa o ka hoʻoiho ʻana ma o kā lākou pūnaewele no nā faila static nui, a me nā faila ʻē aʻe. Hoʻihoʻi ʻia kahi faila mai ka cache "anu" i nā manawa he nui ma mua o ka faila hoʻokahi mai ka cache "anu" o Ali CDN. Mai ka "wela" cache, ua like ka wikiwiki, hoʻohui a emi paha.
Hōʻike CDN Ali:
root@shenzhen1:~# curl -o /dev/null -w@curl_time https://en.semrushchina.cn/my_reports/build/scripts/simpleInit.js?v=1551879212
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 5757k 0 5757k 0 0 513k 0 --:--:-- 0:00:11 --:--:-- 526k
time_namelookup: 0.004286
time_connect: 0.030107
time_appconnect: 0.117525
time_pretransfer: 0.117606
time_redirect: 0.000000
time_starttransfer: 0.840348
----------
time_total: 11.208119
----------
size_download: 5895467 Bytes
speed_download: 525999.000B/sHo'āʻo Akamai:
root@shenzhen1:~# curl -o /dev/null -w@curl_time https://www.semrushchina.cn/my_reports/build/scripts/simpleInit.js?v=1551879212
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 5757k 0 5757k 0 0 1824k 0 --:--:-- 0:00:03 --:--:-- 1825k
time_namelookup: 0.509005
time_connect: 0.528261
time_appconnect: 0.577235
time_pretransfer: 0.577324
time_redirect: 0.000000
time_starttransfer: 1.327013
----------
time_total: 3.154850
----------
size_download: 5895467 Bytes
speed_download: 1868699.000B/sUa ʻike mākou e pili ana ke kūlana ma ka laʻana ma luna o nā kumu like ʻole. I ka manawa e kākau ai i kēia wahi, holo hou au i ka hoʻāʻo. Ua like like nā hopena no nā paepae ʻelua. Hōʻike kēia iā mākou he ʻokoʻa ke ʻano o ka Pūnaewele ma Kina, ʻoiai no nā mea hoʻohana nui a me nā mea hāʻawi kapuaʻi i kēlā me kēia manawa.
I ka helu mua, e hoʻohui au i kahi hoʻohui nui no Akamai: inā hōʻike ʻo Ali i nā uila like o ka hana kiʻekiʻe a me ka haʻahaʻa haʻahaʻa ( pili kēia iā Ali CDN, Ali CEN, a me Ali IPSEC), a laila ʻo Akamai, i kēlā me kēia manawa, ʻaʻohe mea. pehea wau e ho'āʻo ai i kā lākou pūnaewele, hana paʻa nā mea a pau.
He nui ka uhi o Akamai ma Kina a ke hana nei ma o na mea lawelawe.
Ka mea a'u i makemake ole ai:
- ʻAʻole makemake wau i ka pilina pūnaewele a me ke ʻano o ka hana - he ʻilihune loa. Akā, maʻa mau ʻoe iā ia (malia paha).
- ʻOi aku ka hewa o nā hopena hoʻāʻo ma mua o kā mākou pūnaewele.
- Nui aʻe nā hewa i ka wā o nā hoʻokolohua ma mua o kā mākou pūnaewele (uptime ma lalo).
- ʻAʻohe o mākou mau kikowaena DNS ponoʻī ma Kina. No laila he nui nā hewa i nā hoʻokolohua ma muli o ka hoʻonā DNS manawa.
- ʻAʻole lākou e hāʻawi i kā lākou IP range -> ʻaʻohe ala e hoʻopaʻa inoa i nā mea kūpono set_real_ip_from ma kā mākou mau kikowaena.
Metrics (~3626 holo; nā metric a pau koe wale ka Uptime, i ms; helu no ka manawa hoʻokahi):
Mea hoʻolako CDN
Median
75%
95%
pane
Pane ʻaoʻao pūnaewele
ʻO Uptime
pākuʻina kau
hoʻohui
kali
haawe
SSL
AliCDN
9195
10749
17489
1,715
10,745
99.531
57
17
927
479
200
akamai
9783
11887
19888
2,352
11,550
98.980
424
91
1408
381
50
Māhele ma ka pākēneka (ma ms):
Kenekulia
akamai
AliCDN
10
7,092
6,942
20
7,775
7,583
30
8,446
8,092
40
9,146
8,596
50
9,783
9,195
60
10,497
9,770
70
11,371
10,383
80
12,670
11,255
90
15,882
13,165
100
91,592
91,596
ʻO ka hopena kēia: hiki ke koho ʻo Akamai, akā ʻaʻole ia e hāʻawi i ka paʻa like a me ka wikiwiki e like me kā mākou hopena ponoʻī i hui pū ʻia me Ali CDN.
Nā leka liʻiliʻi
ʻAʻole i hoʻokomo ʻia kekahi mau manawa ma ka moʻolelo, akā makemake wau e kākau e pili ana iā lākou.
ʻO Beijing + Tokyo a me Hong Kong
E like me kaʻu i ʻōlelo ai ma luna, ua hoʻāʻo mākou i kahi tunnel IPSEC i Hong Kong (HK). Akā ua hoʻāʻo pū mākou iā CEN iā HK. He emi iki ke kumu kūʻai, a ke noʻonoʻo nei au pehea e hana ai ma waena o nā kūlanakauhale me kahi mamao o ~100 km. Ua lilo ia i mea hoihoi loa ʻo ka latency ma waena o kēia mau kūlanakauhale he 100ms kiʻekiʻe ma mua o kā mākou mana mua (i Taiwan). ʻOi aku ka wikiwiki a me ka paʻa no Taiwan. ʻO ka hopena, ua haʻalele mākou iā HK ma ke ʻano he ʻāpana IPSEC.
Eia hou, ua hoʻāʻo mākou e hoʻokomo i kēia hoʻonohonoho:
- ka pau ʻana o nā mea kūʻai aku ma Beijing,
- IPSEC a me CEN i Tokyo,
- ma Ali CDN ua hōʻike ʻia ke kikowaena ma Beijing i ke kumu.
ʻAʻole paʻa loa kēia papahana, ʻoiai ma ke ʻano o ka wikiwiki, ʻaʻole ia i haʻahaʻa i kā mākou hopena. E pili ana i ka tunnel, ua ʻike au i nā hāʻule liʻiliʻi no ka CEN, pono e paʻa. No laila, ua hoʻi mākou i ka papahana kahiko a hoʻopau i kēia hoʻokūkū.
Aia ma lalo iho nā ʻikepili no ka latency ma waena o nā ʻāpana like ʻole no nā kaha like ʻole. Malia paha e hoihoi mai kekahi.
IPsec
Ali cn-beijing <—> GCP Asia-akau-hikina1 — 193ms
Ali cn-shenzhen <—> GCP asia-hikina2 — 91ms
Ali cn-shenzhen <—> GCP us-hikina4 — 200ms
CEN
Ali cn-beijing <—> Ali ap-akau-hikina-1 — 54ms (!)
Ali cn-shenzhen <—> Ali cn-hongkong — 6ms (!)
Ali cn-shenzhen <—> Ali us-hikina1 — 216ms
ʻIke nui e pili ana i ka Pūnaewele ma Kina
Ma keʻano he hoʻohui i nā pilikia me ka Pūnaewele i wehewehe ʻia ma ka hoʻomaka, ma ka hapa mua o ka ʻatikala.
- He wikiwiki loa ka Internet ma Kina.
- Ua hana ʻia ka hopena ma muli o ka hoʻāʻo ʻana i nā pūnaewele Wi-Fi ākea ma nā wahi like ʻole kahi i hoʻohana ʻia ai kēia mau pūnaewele e ka lehulehu o nā poʻe.
- ʻO ka hoʻoiho a hoʻouka ʻana i nā wikiwiki i nā kikowaena ma Kina ma kahi o 20 Mbit/s a me 5-10 Mbit/s, kēlā me kēia.
- ʻO ka wikiwiki i nā kikowaena ma waho o Kina he mea liʻiliʻi, emi iho ma mua o 1 Mbit/s.
- ʻAʻole paʻa loa ka Pūnaewele ma Kina.
- I kekahi manawa hiki i nā pūnaewele ke wehe wikiwiki, i kekahi manawa lohi (i ka manawa like o ka lā ma nā lā like ʻole), inā ʻaʻole loli ka hoʻonohonoho. Ua nānā mākou i kēia me ka laʻana o semrushchina.cn. Hiki ke hāʻawi ʻia kēia iā Ali CDN, e hana pū ana i kēia ala a ma muli o ka manawa o ka lā, ke kūlana o nā hōkū, etc.
- Kokoke ka pūnaewele puni honua i ka 4G a i ʻole 4G+. E hopu iā ia ma ke kaʻaahi, nā elevators - i ka pōkole, ma nā wahi āpau.
- He moʻolelo wale nō ka hilinaʻi ʻana o nā mea hoʻohana Kina i nā kāʻei kapu ma ka ʻāpana .cn. Ua aʻo pololei mākou i kēia mai nā mea hoʻohana.
- Hiki iā ʻoe ke ʻike pehea hoʻihoʻi hou i www.baidu.com (ma ka ʻāina nui o Kina kekahi).
- Ua ālai ʻia nā kumuwaiwai he nui. Mamua: google.com, Facebook, Twitter. Akā he nui nā kumuwaiwai Google e hana (ʻoiaʻiʻo, ʻaʻole ma Wi-Fi a me VPN ʻaʻole i hoʻohana ʻia (ma ka ʻaoʻao router pū kekahi, ʻoiaʻiʻo nō).
- Ke hana pū nei nō hoʻi nā kikowaena "ʻenehana" o nā hui i hoʻopaʻa ʻia. ʻO ia hoʻi, ʻaʻole pono ʻoe e ʻoki i nā manawa a pau o Google a me nā kumuwaiwai ʻē aʻe i pāpā ʻia. Pono ʻoe e ʻimi i kahi papa inoa o nā kāʻei kapu.
- ʻEkolu wale nō kā lākou mea hoʻohana pūnaewele nui: China Unicom, China Telecom, China Mobile. Aia kekahi mau mea liʻiliʻi, akā ʻaʻole nui kā lākou mākeke
Pōmaikaʻi: kiʻi hoʻonā hope
ʻO ka hopena
Ua hala kekahi makahiki mai ka hoʻomaka ʻana o ka papahana. Ua hoʻomaka mākou me ka hōʻole ʻole ʻana o kā mākou pūnaewele i ka hana maʻamau mai Kina, a lawe wale ʻo GET curl i 5.5 kekona.
A laila, me kēia mau hōʻailona i ka hopena mua (Cloudflare):
olelo hooholo
ʻO Uptime
Median
75 pakeneka
95 pakeneka
Cloudflare
86.6
18s
30s
60s
Ua hōʻea mākou i nā hopena aʻe (nā helu no ka mahina i hala):
olelo hooholo
ʻO Uptime
Median
75 pakeneka
95 pakeneka
Ali CDN + CEN/IPsec + GLB
99.86
8.8s
9.5s
13.7s
E like me kāu e ʻike ai, ʻaʻole hiki iā mākou ke hoʻokō i ka 100% uptime, akā e hele mai mākou me kahi mea, a laila e haʻi mākou iā ʻoe e pili ana i nā hopena i kahi ʻatikala hou :)
Mahalo i ka poe heluhelu i na mahele ekolu a pau. Manaʻo wau ua ʻike ʻoe i kēia mau mea a pau e like me kaʻu i hana ai.
PS Nā ʻāpana mua
Source: www.habr.com