Tradycyjny serwer można zastąpić NAS-em
Wielofunkcyjne urządzenia z kategorii Network Attached Storage już od kilku lat odbierają rynkowe udziały klasycznym serwerom. Wśród nich wyróżniają się NAS-y firmy QNAP, które mogą też działać jako rozwiązanie wirtualizacyjne.

Urządzenia QNAP zostały zaprojektowane zgodnie z koncepcją „wszystko w jednym”, dzięki czemu mogą w małych i średnich firmach zastępować tradycyjne serwery. Oczywiście najczęściej służą do centralnego przechowywania plików i ich zabezpieczania, ale bardzo często wykorzystywaną funkcją jest też rejestratracja obrazu z kamer monitoringu podłączonych do lokalnej sieci. Oprogramowanie, w które wyposażone są NAS-y tego producenta, umożliwia również uruchomienie serwera multimediów, poczty elektronicznej lub stron WWW, modułu CMS, CRM, testowego środowiska programistycznego i wielu innych. QNAP jest rynkowym rekordzistą w tym zakresie, który w swoim „sklepie” udostępnia ponad 200 aplikacji do oferowanych serwerów.
Jednak unikalna cecha urządzeń QNAP Turbo NAS dotyczy wirtualizacji. Wybrane modele mogą działać jako serwer wirtualnych maszyn (serwerów i desktopów) dzięki wbudowanej funkcji Virtualization Station, która bazuje na mechanizmie KVM. W efekcie możliwe staje się centralne przechowywanie i uruchamianie do kilkunastu wirtualnych maszyn (w zależności od mocy procesora i ilości pamięci operacyjnej w serwerze) z różnymi wersjami systemów Windows, Linux i Unix.
Jeżeli firma potrzebuje niewielkiej liczby wirtualnych serwerów, rozwiązanie z wbudowanym wirtualizatorem jest zdecydowanie tańsze niż klasyczny serwer wyposażony w komercyjne oprogramowanie do wirtualizacji. Częstym scenariuszem jest wykorzystanie stacji wirtualizacyjnej do obsługi starszych aplikacji, zainstalowanych dotychczas na fizycznym serwerze, który już dawno powinien być zutylizowany. Z funkcji Virtualization Station często korzystają też klienci, których oprogramowanie księgowe wymaga, aby w firmowej infrastrukturze działał serwer MS SQL.
Zaawansowana ochrona danych
Ochrona danych przechowywanych w serwerach QNAP jest realizowana na wielu poziomach. Dyski można połączyć w strukturę RAID, a znajdujące się na nich dane zaszyfrować 256-bitowym kluczem AES, zgodnie z rygorystycznym standardem FIPS 140–2. Firmy, którym zależy na dodatkowym bezpieczeństwie, powinny nabyć drugi, bliźniaczy serwer i uruchomić synchroniczną replikację między urządzeniami. Możliwe jest także sporządzanie backupu na podłączonym przez port USB lub eSATA zewnętrznym dysku twardym.
Informacje są też chronione dzięki funkcji migawek (snapshot), spotykanej dotychczas wyłącznie w systemach klasy enterprise. W nowej wersji oprogramowania serwerów QNAP (QTS 4.2) producent zapewnił możliwość kopiowania bloków. W ten sposób powstał mechanizm tworzenia do 1024 kopii migawkowych całych woluminów lub jednostek LUN (funkcja QNAP Snapshot jest dostępna tylko na serwerach wyposażonych w min. 4 GB pamięci RAM). Ciekawym narzędziem jest również wbudowana funkcja Qsirch, która znacznie upraszcza i przyspiesza wyszukanie konkretnego pliku, nawet wśród olbrzymiej ilości danych zgromadzonych na serwerze NAS.
Serwery plików QNAP są objęte 2-, 3- lub 5-letnią gwarancją. Ich autoryzowanymi dystrybutorami w Polsce są: ABC Data, Action, EPA Systemy i Konsorcjum FEN.
Serwer QNAP jako UTM
Dzięki stacji wirtualizacyjnej serwery QNAP Turbo NAS mogą także pełnić funkcję UTM-a, zabezpieczającego sieć przed zagrożeniami płynącymi z Internetu. QNAP rekomenduje stosowanie oprogramowania Sophos XG Firewall, które jest dostępne w wersji komercyjnej, jak też całkowicie darmowej – dla użytkowników domowych. Zainstalowany w maszynie wirtualnej Sophos XG Firewall może pełnić rolę zabezpieczenia na brzegu sieci, zarządzać ruchem sieciowym, procesem routingu oraz obsługą DNS. Produkt ten wyposażony jest też w silnik antywirusowy z opcją dual scan, rozwiązanie do skanowania połączeń, narzędzia do kształtowania pasma ruchu, zabezpieczenia serwerów pocztowych i web serwerów, zarządzania sieciami bezprzewodowymi i wiele innych.
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Monitoring wizyjny: jesteśmy skazani na kamery
Mieszkańcom miast zdarza się utyskiwać na wszechobecność kamer naruszających ich prywatność. Tymczasem niechciane kamery nieraz pozwoliły wykryć sprawców poważnych wykroczeń i ograniczyły przestępczość w ośrodkach miejskich.
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Rynek NAS: „klienci zobaczyli, że chmura nie jest idealna”
Rozwój zdalnych biur, któremu towarzyszy rosnąca ilość danych i połączonych urządzeń w domach, jeszcze długo będzie zwiększać zapotrzebowanie na NAS-y.
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QNAP gwarantuje bezpieczeństwo danych oraz usług
Priorytetem QNAP-a jest bezpieczeństwo produktów tej marki oraz zgromadzonych w nich danych. Dodatkowy poziom ich ochrony wprowadzony został w nowym systemie QTS 5.0.