- Mgt may tinh
6.So sanh giua he thong cu va he thong nghien ciru nang cap:
+ Ve cong nghe:
He thong cii dugc nghien cuu dua tren nhirng cong nghe c6 san dugc nghien cuu dua vao he thong cho phii hgp vdi muc dich de ra trong do dua nhieu vao may tinh.
He thong nghien cuu nang cap mdi c6 nhieu van de tu nghien cim nhu phan cimg cimg vdi phan mem cua mang ST. Tuy cau true he thong van giij nhu cu nhung nhd mang ST, he thong dugc md rgng mgt each khong gidi han ma gia thanh re, de trien khai lap dat ung dung.
^
. + Ve mat tien ich:
Do he thong cii dua nhieu vao may tinh (mgt may tinh quan ly 1 HUB chi dugc toi da vai chuc Controller) nen khi trien khai ung dung rat bat tien, gia thanh dat, hieu qua cua he thong khong cao do ngudi sir dung thudng tan dung may tinh lam nhii"ng viec khac hoac tat may, tir do han che viec truy cap theo doi tir trung tam.
He thong mdi chay tren mang va phan mem rieng biet nen khong bi nhirng tac dgng ben ngoai lam anh hudng, tie do truy cap cao, gia thanh trien khai re. Khi trien khai de l4p dat do ciu true cua he thdng dugc nghien cuu phii hgp vdi thirc te.
+ Ve hieu qua cua he thong:
He thong cii chi xem va dieu khien true tiep nen hieu qua ung dung khdng cao, luon ludn phai c6 mgt ngudi quan sat theo doi qua trinh hoat dgng ciia thilt bj, nlu khong se khong co co sd danh gia hoat dgng cua thilt bi.
H? thong mdi nhd co chuong trinh luu trir lai dii lieu, co chuong trinh phan tich ve bieu do nhiet do phong, dong khdi dgng, dong hoat dgng ciia thilt bi nen hieu qua cua he thong cao hon. Ngudi kiem soat truy cap vao chuong trinh kilm tra cac dii" lieu la co the danh gia dugc hieu qua boat dgng cua timg thiet bi, nhiing loi cua thiet bi, loi cua ngudi sir dung deu c6 the phat hien ra thong qua sir danh gia phan tich cac dil lieu da dugc luu tru* tren may tinh.
+ v l thilt ke:
He thong cii bao gdm Hub, Controller dugc thiet ke dan gian, hinh thuc khong dep, it cong dung.
r r r \
He thong mdi thiet ke ggn hon, co nhieu ung dung hon. Controller ngoai viec kiem soat may dieu hoa, may hut trung tam, he thong say, la eon cd the ket noi vdi dau bao khoi co san tren thi trudng tir do Controller c6 them chuc nang bao chay. Ngoai ra Controller c6 the kiem soat cac thiet bi khac thong qua viec khai bao tren phan mem. Cac Bridge, Switch, Hub thiet ke mdi tao cho mgt may tinh co the kiem soat len den hang chuc nghin thiet bi giiip he thdng de dang thuan tien trong viec trien khai irng dung.
+ Ve mat kinh te:
De kiem soat khoang 200 Controller (tuong duong vdi khoang 400 thiet bi theo thilt ke cii) phai can den 30 may tinh, ngoai ra can phai 30 Hub chuyen dung va 10 Hub Internet. Gia thanh len din 200 trieu dong (30 may tinh x 5 trieu ddng; 30 Hub X 1,5 trieu dong; 10 Hub Internet x 800 ngan dong).
Trong khi do, nlu ung dung he thong mdi chi mat mgt khoang kinh phi la 50 trieu d6ng (1 may tinh x 5 trd; 30 Hub x 1,5 trd; 1 Switch x 800 ngan ddng; 4 Bridge X 800 ngan d6ng). Nhu vay, gia thanh he thong mdi se re hon he thong cu gap 4 Jan.